calculate the mass of .00566 mol of germanium, show work.

Answers

Answer 1
1 mol of germanium = molar mass = 72.630 grams.

(0.00566 mol Ge) x (72.630 grams/1 mol Ge) = 0.410 grams age

Related Questions

Which of the following properties can be used to describe both the particle model of light and the wave model of light

Answers

An absolutely interesting occurrence is light. Despite the fact that it is well recognized that light is an electromagnetic, it is frequently more practical to characterise or characterize light in other ways than only as a wave.

For instance, light is frequently depicted as anything other than a wave in spectroscopy and fundamental physics.

Similar to how we replicate oceans moving through water, the Wave Model illustrates how light propagates. Colors can be explained using the Wave Model by including information about wavelength.

The Light Wave Model. Similar to how we simulate ocean waves moving across water, the Wave Model illustrates how light propagates. We can explain qualities of light by imagining it to be an oscillating wave.

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LPG consists of mainly
A. methane, ethane and hexane
B. ethane, hexane and nonane
C. methane, hexane and nonane
D. methane, butane and propane

Answers

D. methane, butane and propane

Propane and butane are both types of alkane hydrocarbons with relatively low boiling points, which allows them to be easily converted to a liquid form at relatively low pressures. This makes them easy to transport and store. Methane, ethane, and hexane are also alkane hydrocarbons, but they are not typically found in large amounts in LPG.

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Definition of RMA in chemistry pls

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Answer:

Molecule name: N--N-METHYL-N-PROP-2-YNYLAMINE

Formula: C13 H15 N

Molecular weight: 185.265 Da

RMA-3 (Rubidium Microporous Aluminosilicate-3) was hydrothermally synthesized from rubidium–aluminosilicate gels without using any organic or inorganic additives, and its structure determined by XRD Rietveld analysis was confirmed as a novel framework topology containing two 8-membered ring pore-openings with dimensions of 0.49 × 0.37 nm and 0.34 × 0.38 nm

Answer:

Hey there! Just wanted to let you know that the term RMA stands for "relative molecular mass" in chemistry. This is a measure of the size of a molecule, calculated by adding up the atomic weights of all the atoms in the molecule. For example, the relative molecular mass of water (H2O) is 18, because the atomic weight of hydrogen (H) is 1 and the atomic weight of oxygen (O) is 16. The relative molecular mass of a molecule is typically expressed in atomic mass units (amu) and can be useful for characterizing and comparing different substances, and predicting their physical and chemical properties.

Classify the reaction in each of the following equations.
a. FeCl2 (aq) + Mg → MgCl2 (s) + Fe(s)

b. NH3 (g) → N2 (g) + H2 (g)

Answers

Answer

a. Single displacement

b. Decomposition

When classifying chemical reactions, consider how reactants change to form the products.

An equation for a chemical reaction has a left side and a right side. The arrow separates the left and right sides.

The left side is called the reactants. The right side is called the products.

Each product or reactant can be one or more elements.

Some Types of Reactions

We can use letters* to represent products and reactants in a reaction.

Synthesis

Two reactants become one product.

A + B  →  ABDecomposition

One reactant becomes two products.

AB  →  A + BIn equation (b), this is like how NH₃ separated into two products, N₂ and H₂.

Single Displacement

Start with two reactants, a compound and an element. To form the products, the element replaces one of the elements that was in the compound.

AB + C  →  AC + BIn equation (a), this is like how Mg replaced Fe. Fe was part of a compound at first. Now, Mg is part of a compound instead.Double Displacement

Start with two reactants that are compounds. To form the products, an element from each compound replaces each other.

AB + CD  →  AC + BD

Therefore, equation (a) is a single displacement reaction and equation (b) is a decomposition reaction.

*Each letter represents an element. Two elements make a compound. A letter can also represent a compound if compound stays together during the reaction.

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which type of radioactive decay has the net effect of changing a neutron into a proton?

Answers

Answer: Beta Decay is the kind of radioactive decay that has the net effect of changing a neutron into a proton.

Explanation:

The opposite path, in which a neutron becomes a proton, is also possible. Exactly what happens is that a weak force changes the flavor of the card from top to bottom and vice versa. When this happens, the quark emits a W boson, which quickly decays into either an electron/antineutrino pair or a positron/neutrino pair, depending on the direction of change (neutron decays to protons, electron/antineutrino pairs are created).

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For each of the following chemical equations, write all possible mole ratios. a. 2HgO(s) → 2Hg(l ) + O2(g) b. 4NH3(g) + 6NO(g) → 5N2(g) + 6H2O(l ) c. 2Al(s) + 3H2SO4(aq) → Al2(SO4)3(aq) + 3H2(g)

What is c. 2Al(s) + 3H2SO4(aq) → Al2(SO4)3(aq) + 3H2(g)

Answers

a) The mole ratio is 2/1

b) The mole ratio is 4/6

c) The mole ratio is 2/3

What is the mole ratio?

We have to note that the mole ratio is the ratio of the stoichiometric coefficient that we have between two reactants that can be found in an equation. In the case of the reaction equations that we have, we must look closely at each equation.

As we can see, each of the reaction equations is balanced and we can now be able to obtain the mole ratio of each of the reaction as shown in the answer above.

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What is the molecular formula of a compound that has an empirical formula of CH2O and a molar mass of 120.12 g/mol

Answers

The molecular formula of a compound that has an empirical formula of CH₂O and a molar mass of 120.12 g/mol is C₄H₈O₄.

A molecular formula shows the number of different types of atoms that are present in a molecule whereas an empirical formula represents the simplest whole number ratio of the different atoms present in a molecule.

Given,

empirical formula= CH₂O

molar mass = 120.12 g/mol

To find: molecular formula

we know that,

atomic mass of carbon= 12 g/mol

atomic mass of hydrogen= 1g/mol

atomic mass of oxygen= 16 g/mol

molar mass of CH₂O

= (12+ 1×2 + 16) g/mol

=30 g/mol

therefore, molecular formula

⇒(CH₂O )n = 120.12

⇒30 n= 120.12

⇒n=120.12/30

⇒n= 4.004

⇒n≈4

Thus,

(CH₂O )n = (CH₂O )4 =C₄H₈O₄

Hence, molecular formula is C₄H₈O₄

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What two molecules make up aspartame?

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Aspartic acid and phenylalanine are the two amino acids that make up aspartame, along with methanol. When the body processes this third key ingredient, formaldehyde and formic acid are produced.

Materials, Raw Two amino acids, phenylalanine and aspartic acid, as well as methanol, make up aspartame. L-aspartyl-L-phenylalanine methyl ester is its formal chemical name. Proteins are made up of amino acids, which are frequently referred to as the building blocks of proteins. Aspartame has the chemical formula C14H18N2O5. In foods and beverages, aspartame, a synthetic, non-saccharide sweetener that is 200 times sweeter than sucrose, is frequently used as a sugar substitute. The commercial names for it are NutraSweet, Equal, and Canderel.

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Name the following alkyne. Be sure to use hyphens (-) not endashes (-).

Answers

2,2-Dimethylbut-1-yne .The alkyne name is formed using the IUPAC nomenclature system.

First, the length of the longest continuous carbon chain (containing the triple bond) must be identified. In this case, it is a four-carbon chain (but-).

Second, the location of the triple bond must be determined. In this case, it is located on the first carbon atom so the prefix 1- is used.

Third, the substituents must be listed in alphabetical order. In this case, there are two methyl groups (2,2-dimethyl).

The final name is 2,2-Dimethylbut-1-yne.

2,2-Dimethylbut-1-yne .The alkyne name is formed using the IUPAC nomenclature system.

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A reaction produces 4.93 L of oxygen, but was supposed to produce 1 mol of oxygen. What is the percent yield

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When only 1 mol of oxygen was intended to be produced, a process instead yields 4.93 L of oxygen. The percent yield of the reaction is 493%.

Percent yield is a measure of how much of the desired product is produced in a chemical reaction. It is calculated by comparing the actual yield of a product to the theoretical yield, which is the amount of product that would be produced if the reaction were 100% efficient.

To calculate the percent yield, you can use the formula:

= percent yield

= (actual yield / theoretical yield) x 100%

The theoretical yield of a reaction is calculated by multiplying the number of moles of reactant used by the stoichiometry of the reaction. In this case, the reaction is supposed to produce 1 mol of oxygen, which is the theoretical yield. To calculate the actual yield, we can use the Ideal gas law PV = nRT, where P is the pressure, V is the volume, n is the number of mol. Since we know that V = 4.93 L, we can use this information to find n:

= n

= (PV) / RT

The actual yield is 4.93 L of O2 or 4.93 L of any gas at STP (Standard Temperature and Pressure) is equivalent to 4.93 moles of O2.

Then we can use this information to calculate the percent yield:

= percent yield

= (actual yield / theoretical yield) x 100%

= (4.93 moles O2 / 1 mole O2) x 100%

= 493%

So, the percent yield of the reaction is 493%.

It's important to note that a percent yield of greater than 100% is usually an indication of an error in the measurement or calculation of the actual yield, or it could be an indication that the theoretical yield is incorrect.

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Coca-Cola is making a version of Coke that uses sucrose (C12H22O11) instead of high fructose corn syrup. If there are 39.24 grams of sucrose in a 12.0 fluid oz. can of this Coke, what is the molarity of sucrose in the Coke

Answers

Coca-Cola is making a version of Coke that uses sucrose (C12H22O11) instead of high fructose corn syrup. The molarity of sucrose in the Coke is 0.32 mol/L.

Coca-Cola is making a version of Coke that uses sucrose (C12H22O11) instead of high fructose corn syrup. If there are 39.24 grams of sucrose in a 12.0 fluid oz. can of this Coke, what is the molarity of sucrose in the Coke.

To find the molarity of sucrose in the Coke, we first need to find the number of moles of sucrose present in the can. We can use the mass of sucrose (39.24 g) and the molar mass of sucrose (342.3 g/mol) to find the number of moles of sucrose:

= (39.24 g) / (342.3 g/mol)

= 0.114 mol

Next, we need to find the volume of the can in liters. We can convert the volume in fluid oz. to liters using the conversion factor 1 fluid oz.

= 0.0295735 L:

= (12.0 fluid oz.) x (0.0295735 L/fluid oz.)

= 0.354882 L

Finally, we can use the formula for molarity (moles of solute / liters of solution) to find the molarity of sucrose in the Coke:

= molarity

= (0.114 mol) / (0.354882 L)

= 0.32 mol/L

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The IUPAC name for dimethyl ketone is ) 2-propanal. B) 3-propanal. C) 2-propanone. D) 1-propanone. E) acetone

Answers

The IUPAC name for dimethyl ketone is (C) 2-propanone

The prefix "di-" indicates two methyl groups (CH3) is attached to the parent compound, which is a ketone. The parent compound is also known as propanone.

It is a clear, colorless liquid that is commonly used as a solvent and in the production of various chemicals and materials. It is also known as acetone. It is used as a solvent, as a starting material in the synthesis of other compounds, and as an intermediate in the production of certain polymers.

Utilized to create compounds such as plastic, fiber, medicines, and other substances. Other compounds can also be dissolved with it. It is a byproduct of the breakdown of human fat and is found naturally in plants, trees, volcanic gases, forest fires, and other organisms.

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Sulfuryl chloride is in equilibrium with sulfur dioxide and chlorine gas: so2cl2(g) so2(g) + cl2(g) a system with a volume of 1. 00 l is in equilibrium at a certain temperature with p(so2cl2) = 1. 00 bar and p(so2) = p(cl2) = 0. 10 bar. By how much will the number of moles of so2cl2 at equilibrium change if the volume is reduced to 0. 50 l? (a) increase 1-10% (b) increase 11-50% (c) decrease 1-10% (d) decrease 11-50%

Answers

The volume is decreased to 0. 50L, the number of moles of SO₂Cl₂at equilibrium will increase by 1–10% option - a is correct.

What is Le Chatelier's Principle.

The guiding idea of Le Chatelier is as follows: A shift in the position of the equilibrium results from a change in one of the variables that characterize a system in equilibrium and cancels out the effects of that change.

Now to solve this question first we have to know the Le-chatelier's

Principle

The Principal that if a system in chemical equilibrium is subjected to a disturbance it tends to change in a way that opposes this disturbance.

SO₂Cl₂(g) ⇄ SO₂(g) + Cl₂(g)

Initially, there is one molecule at the left hand side of the reaction and two molecules are on the right. But, the Partial pressure of molecules on RHS is lower than LHS. Concentration of RHS molecules is Lower, forward reaction is more favorable.

Decreasing volume would result in increasing the total pressure.

Now, according to Le chatelier's Principle, the equilibrium will shift in such a way to oppose change under compression. Since there are more moles of Products than reactants, to counteract the increased pressure. The equilibrium will shift to LHS increasing the moles

of SO₂Cl₂ but since the concentration (Partial Pressure)

of SO₂Cl₂, it will not increase more than 10%

Hence, answer will be (a) Increase 1-10%.

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What sources of error may have contributed to the percent yield not being 100 percent? Think about things that may have led to inaccurate measurements or where mass of the product could have been lost if this experiment was conducted in a physical laboratory

Answers

The product could have been lost if this experiment was conducted in a physical laboratory: Human Error, Incomplete Reaction, Inadequate Stirring, Impurities and Loss of Product.

What is product?

Product is a tangible or intangible good that is produced for sale on the market.

1. Human Error: Inaccurate measurements or miscalculations during the experiment may have caused the percent yield not to be 100%.
2. Incomplete Reaction: Depending on the reaction conditions, it is possible that the reaction did not go to completion, leading to a lower percent yield than expected.
3. Inadequate Stirring: If the reactants were not adequately mixed during the experiment, some reactants may not have been able to properly react, resulting in a lower percent yield.
4. Impurities: If the reactants used in the experiment were impure, it could lead to a lower percent yield due to the presence of undesirable substances that can interfere with the reaction or are not involved in the reaction.
5. Loss of Product: If the experiment was conducted in a physical laboratory, it is possible that some of the product was lost during the experiment due to improper handling or other factors.

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What are the six physical properties associated with hazard recognition of hazardous materials/chemicals

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The six physical properties associated with hazard recognition of hazardous materials/chemicals are Flammability, Reactivity, Toxicity, Corrosivity, Physical hazards, Health hazards are explained below with details.

1. Flammability: The ability of a material to catch fire and burn easily.

2. Reactivity: The ability of a material to chemically react with other materials, including the potential for explosions or release of toxic gases.

3. Toxicity: The ability of a material to cause harm or death when ingested, inhaled, or absorbed through the skin.

4. Corrosivity: The ability of a material to eat away at or damage other materials, including metals and human tissue.

5. Physical hazards: The potential of a material to cause harm through physical means, such as pressure, impact, or friction.

6. Health hazards: The potential of a material to cause harm to human health, including acute and chronic effects.

These are the six physical properties associated with hazard recognition of hazardous material.

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the reaction between strontium hydroxide and chloric acid produces __________.

Answers

The reaction between strontium hydroxide and hydrochloric acid produces strontium chloride and water.

Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of : Ag
Pb
Sn
Mg
Cu

Answers

Iron objects such as storage tanks and underground pipelines can be protected from corrosion by connecting them through a wire to a piece of Mg.

General corrosion happens when the majority or even all atoms on such a metal surface become oxidized, causing the surface to corrode completely. The majority of metals were easily oxidised, which means they frequently lose oxygen electrons (among other elements) in the air either in water. Oxygen joins with the metal to produce an oxide as it becomes reduced (gains electrons).

A refined metal usually transformed naturally by corrosion into a safer stable chemical form, including its oxide, hydroxide, and sulphide. By reacting chemically and/or electrochemically with their surroundings, materials slowly degrade. Additionally, it gradually eliminates the element using chemical processes.

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In general, which of the following ranks the repulsions indicated from weakest to strongest? O Lone pair-bonding pair, lone pair-lone pair, bonding pair---bonding pair O Bonding pair-bonding pair, lone pair-bonding pair, lone pair-one pair O Lone pair-lone pair, lone pair-bonding pair, bonding pair-bonding pair O Lone pair-bonding pair, bonding pair-bonding pair, lone pair-one pair

Answers

Option B, Bonding pair-bonding pair, lone pair-bonding pair, lone pair-lone pair. The electrons in bonding pairs are repulsion held relatively closely together, and are involved in the formation of a chemical bond.

The repulsion between two bonding pairs is relatively weak, as they are attracted to the positively charged nuclei of the atoms they are bonding. The repulsion between a lone pair of electrons and a bonding pair of electrons is generally stronger than that between two bonding pairs because the lone pair is not involved in bonding and tends to be held further away from the nucleus, causing the electron cloud to be larger and thus a stronger repulsion because the two lone pairs are not involved in bonding, and are held relatively far away from the nuclei, causing the electron clouds to be larger and thus a stronger repulsion

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In the molecule C2H4 the valence orbitals of the carbon atoms are assumed to be?
a) dsp hybridized
b) not hybridized
c) sp hybridized
d) sp^3 hybridized
e) sp^2 hybridized

Answers

In the molecule C2H4, valence orbitals of the carbon atoms are assumed to be e) sp^2 hybridized.

What is valence orbitals?

The set of orbitals that can energetically accept electrons to create chemical bonds is known as the valence shell. The ns and np orbitals in the outermost electron shell make form the valence shell for main-group elements.

The outside electrons engaged in bonding are called valence electrons. A particular atom can have 0 to 7 valance electrons since valance electrons can only exist in the s and p orbitals. Noble gases are atoms that have no valence electrons and dislike forming bonds.

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The enthalpy of solution of KBr in water is about 198 kJ/mol. Nevertheless, he solubility of KBr in water is relatively high. Why does the solution process occur even though it is endothermic?

Answers

The process of dissolution of KBr in water occurs because the final solution has a lower energy state than the two components separately.

What do you mean by endothermic?

Endothermic reactions are chemical reactions that absorb energy from their surroundings in order to proceed. This energy is usually in the form of heat and is absorbed from the surroundings in order to drive the reaction forward.

Even though the dissolution process is endothermic, it occurs because the enthalpy of solution is less than the sum of the enthalpies of the two components separately. The enthalpy of solution is the energy required to break the strong ionic bonds between the KBr molecules, allowing them to dissolve into the solution. The energy released from the formation of new hydrogen bonds between the KBr molecules and the water molecules is greater than the energy needed to break the ionic bonds, resulting in a net release of energy. This release of energy causes the overall process to be exothermic, even though the dissolution of KBr into water is endothermic.

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Calculate the number of molecules in 9.03 liters of carbon dioxide gas at standard temperature and pressure.

Answers

9.03 liters of carbon dioxide gas would contain 0.40 moles of carbon dioxide molecules. Since 1 mole of any gas contains 6.02 x 10^23 molecules, the number of molecules of carbon dioxide gas in 9.03 liters of carbon dioxide gas at STP would be 2.41 x 10^23 molecules.

What is molecules?

Molecules are the smallest units of matter that can exist by themselves. They are composed of two or more atoms that are held together by chemical bonds. Molecules can be found in the air we breathe, the water we drink, and the food we eat. They can also be found in living organisms, like plants and animals. Molecules can be made of a variety of different atoms, such as oxygen, carbon, nitrogen, and hydrogen.

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Steel is an alloy containing Fe atoms and C atoms. Which of the following diagrams best represents the particle-level structure of steel ?

Answers

the diagram that best represents the particle-level structure of steel as alloy is option (b).

Alloy, often known as an alloy, is a metallic material made up of two or more elements. Even though carbon, a nonmetal, is a crucial component of steel, the constituents of alloys are typically themselves metals.

Typically, melting the mixture of materials produces alloys. Early civilizations recognized the usefulness of alloys; brass (copper and zinc) and bronze (copper and tin) were particularly significant.

Steel is an alloy of iron and carbon. carbon range is upto 2 percent in the mixture.

In steel iron atoms are larger than carbon.

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When 10g of hydrogen gas react with chlorine gas, how many liters hydrogen monochloride (HCl) will be produced at STP

Answers

The amount of hydrogen monochloride that is produced at STP is 152 mL.

The balanced chemical reaction can be depicted as follows:

H₂ + Cl₂ -----> 2 HCl

According to stoichiometry, When one mole of hydrogen reacts with one mole of chlorine, it yields two moles of hydrogen monochloride. Stoichiometry defines the relationship between the quantities of reactants and products before, during, and following chemical reactions

If, 2 g of Hydrogen reacts with 71 g of chlorine to form 73 g of Hydrogen Chloride.

Therefore,  if 10 g reacts with 142 g of chlorine, the HCl produced will be 152 g or 152 ml of HCl.

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How many moles in 28 grams of UO22- ?

Answers

The amount, in moles in 28 grams of [tex]UO_2[/tex] would be 0.1037 mol.

Moles determination

The mole of a substance is the ratio of the mass of the substance and the molar mass of the substance. This can be mathematically expressed as:

Mole = mass/molar mass

Molar mass of [tex]UO_2[/tex] = 238 + (16x2) = 270 g/mol

Thus, the number of moles in 28 grams of [tex]UO_2[/tex] would be:

Mole = 28/270 = 0.1037 mol

In other words, the number of moles in 28 grams of [tex]UO_2[/tex] would be 0.1037 mol.

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How many moles in 28 grams of UO2?

The measured electric mobilities of K+ (aq) and Cl– (aq) at a KCl concentration of 0.30 mol L–1 are respectively, 5.9  10 –4 and 6.14  10–4 cm2 V–1 s–1 at 30 OC. Calculate the transport numbers and molar ionic conductivity of K+ and Cl–. What is the molar conductivity of KCl at this concentration? Assume complete ionisation of KCl.

Answers

The molar conductivity of KCl at this concentration and  transport numbers and molar ionic conductivity of K+ and Cl– are

Λm =1.806×10−4 t(K+)=4.90033223×10^−9 t(Cl-) =5.09966777×10^−9

What is the molar conductivity of KCl at this concentration?

Generally, The transport number, t, of an ion can be calculated using the equation: t = (μi x Ci) / Λm,

where

tμi is the electric mobility of the ion, Ci is the concentration of the ion, and Λm ishe molar conductivity of the electrolyte solution.

Given that the electric mobility of

K+ is 5.9 x 10^-4 cm^2 V^-1 s^-1, the electric mobility of Cl- is 6.14 x 10^-4 cm^2 V^-1 s^-1, and the concentration of KCl is 0.30 mol L^-1, we can calculate the transport numbers as:

t(K+) = (5.9 x 10^-4 cm^2 V^-1 s^-1 x [K+]) / Λm t(Cl-)

= (6.14 x 10^-4 cm^2 V^-1 s^-1 x [Cl-]) / Λm

where

[K+] and [Cl-] are the molar concentrations of K+ and Cl- ions, respectively.

The molar ionic conductivity, Λi, of an ion can be calculated using the equation: Λi = μi x Ci,

where

μi is the electric mobility of the ion and Ci is the concentration of the ion.

Given that the electric mobility of K+ is 5.9 x 10^-4 cm^2 V^-1 s^-1 and the concentration of K+ is 0.15 mol L^-1, the molar ionic conductivity of K+ is:

Λ(K+) = 5.9 x 10^-4 cm^2 V^-1 s^-1 x 0.15 mol L^-1

Λ(K+) =8.85×10−5

Similarly, given that the electric mobility of

Cl- is 6.14 x 10^-4 cm^2 V^-1 s^-1 and the concentration of Cl- is 0.15 mol L^-1, the molar ionic conductivity of Cl- is:

Λ(Cl-) = 6.14 x 10^-4 cm^2 V^-1 s^-1 x 0.15 mol L^-1

Λ(Cl-) =9.21×10^−5

Finally, the molar conductivity of KCl can be calculated as:

Λm = Λ(K+) + Λ(Cl-)

=9.21×10^−5+8.85×10^−5

Λm =1.806×10−4

The transport numbers of K+ and Cl- can be calculated by

t(K+) = Λ(K+) / Λm and

t(Cl-) = Λ(Cl-) / Λm respectively.

t(K+) = 8.85×10−5/1.806×10−4 '

t(K+)=4.90033223×10^−9

and

t(Cl-) =9.21×10^−5/1.806×10−4

t(Cl-) =5.09966777×10^−9

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What is the volume of a sample of liquid mercury that has a mass of 72.2 g, given that the density of mercury is 13.6 g/mL

Answers

The sample has a volume of 5.3 mL.

What is sample?

Sample in chemistry is the collection of atoms, molecules, or other physical forms of a substance that are used for testing, analysis, or other scientific purposes. Samples are typically collected from a larger population and then studied to understand the larger population. In chemistry, samples can range from tiny amounts of a single chemical compound to large amounts of a mixture of compounds. Sampling is important for understanding chemical properties and reactions, as it helps scientists analyze the behavior of compounds in different situations.  Sampling can also be used to determine factors such as the toxicity, stability, or reactivity of a material.

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Use information from the reaction to design an experiment that could be used to remove the tarnish (Ag2S) from a silver fork

Answers

Line a basin with foil, add a teaspoon of bicarbonate of soda and a sprinkle of salt, and then pour in hot water. The tarnished silver object may then be immersed in water, ensuring sure it comes into touch with the aluminum foil, as well as the silver sulphide tarnish will quickly dissipate.

Tarnish is caused by a chemical interaction between silver and sulfur-containing compounds in the air. Silver sulphide is formed when silver combines with sulphur. Silver sulphide is a dark substance. A thin layer of silver sulphide grows on the surface of silver, darkening it.

Experimental design is a technique that enables scientists and engineers to efficiently assess the effect of multiple inputs, or factors, on measures of performance, or responses. A bone density research, for example, contains three experimental groups: a control group, the stretching exercise group, as well as a jumping exercise group. In a between-subjects experiment, investigators allocate each participant to one of three groups at random. While silver is the most commonly linked with tarnishing, it may occur on almost every metal, including aluminum, copper, and brass.

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The gas in a 250.0 mL piston experiences a change in pressure from 1.00 atm to 4.90 atm. What is the new volume (in mL) assuming the moles of gas and temperature are held constant

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The gas in a 250.0 mL piston experiences a change in pressure from 1.00 atm to 4.90 atm. 56.2 ml is the new volume (in mL) assuming the moles of gas and temperature are held constant.

What is Boyle's law ?

Boyle's law states that at a given temperature, the volume of a gas and its pressure are inversely proportional.

Robert A. Boyle discovered the law in 1662, which states that at a constant temperature, the volume of a gas is inversely proportional to the pressure exerted by the gas.

Given:

Initial volume (V₁) = 250 mL

Initial pressure (P₁) = 1.00 atm

Final volume (V₂) = ?

Final pressure (P₂) = 4.45 atm

Assuming the gas has an ideal behavior, we can find the final volume by using Boyle's law as follows:

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁/P₂

V₂ = 1.00 atm × 250 mL / 4.45 atm

V₂ = 56.2 ml

Thus, 56.2 ml  is the new volume (in mL) assuming the moles of gas and temperature are held constant.

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Examine the phase diagram for the substance Bogusium (Bo) and select the correct statement Pressure 760 ton AL C. •D Temperature O Point B represents the triple point for Bo. O Bo changes from a solid to a gas as one follows the line from C to D. O Bo changes from a solid to a liquid as one follows the line from C to D.
O Bo(s) has a lower density than Bol). O The triple point for Bo is at a higher temperature than the melting point for Bo.

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The triple point of a substance is the temperature and pressure at which all three phases of the substance (solid, liquid, and gas) can coexist in equilibrium.

Point B on the phase diagram is the triple point for Bogusium, represented by the intersection of three lines, which indicates that all three phases can coexist in equilibrium at this point.

1. A triple point of a substance is the temperature and pressure at which all three phases of the substance can coexist in equilibrium.

2. Point B on the phase diagram is the triple point for Bogusium, represented by the intersection of three lines.

3. This indicates that all three phases can coexist in equilibrium at this point.

4. Therefore, the correct statement is that Point B represents the triple point for Bo.

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A compound is found to contain 10.37 % phosphorus, 4.689 % nitrogen, and 84.95 % iodine by weight. The molecular weight for this compound is 298.8 g/mol. What is the molecular formula for this compound

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Answer:

P₂N₂I₄

Explanation:

Firstly, we calculate the empirical formula of the compound. To do this we find the moles of each element. Treat the percentages as masses.

The formula for moles is:

[tex]moles = \frac{mass}{relative \: atomic \: mass}[/tex]

The masses of each element are:

Phosphorus = 10.37g

Nitrogen = 4.689g

Iodine = 84.95g

The relative atomic masses of each element are:

Phosphorus = 31.0

Nitrogen = 14.0

Iodine = 126.9

Using these values, we can calculate the moles of each element:

[tex]moles \: of \: phosphorus = \frac{10.37}{31.0} = 0.335[/tex]

[tex]moles \: of \: nitrogen \: = \: \frac{4.689}{14.0} = 0.335[/tex]

[tex]moles \: of \: iodine \: = \: \frac{84.95}{126.9} = 0.669[/tex]

Using the moles, write them in a ratio to find the ratio of moles:

Phosphorus : nitrogen: iodine

0.335 : 0.335: 0.669

The smallest number here is 0.335, so divide each number by 0.335

0.335÷0.335=1

0.335÷0.335=1

0.669÷0.335=1.99... = 2 (round to the nearest whole number)

These numbers are used as the subscripts of each element.

This means that the empirical formula is:

PNI₂

To calculate the molecular formula:

[tex]\frac{molar \: mass \: of \: molecular \: formula}{molar \: mass \: of \: empirical \: formula}[/tex]

The molar mass of empirical formula is adding the molar masses of compound PNI2:

31.0 + 14.0 + 126.9 = 171.9

The molar mass of molecular weight or mass = 298.8 (given from the question)

Substitute these in the formula above:

[tex] \frac{298.8}{171.9} = 1.738...[/tex]

1.738 = 2 rounded to the nearest whole number.

Multiply all the subscripts seen in the empirical formula by the number 2:

PNI₂ × 2 = P₂N₂I₄

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