Are the gas laws affected depending on whether you use heavy gas particles or light gas particles? If anything, what is affected by the size of the molecule?

3.115 moles of hydrogen were produced when 6.23 moles of Li were combined. Utilizing 80.57 grams of Li, 11.60 grams of hydrogen were produced.

Hydrogen is most frequently found in water on earth. The hydrogen atoms in each hydrogen atom (H2 O) total two. On the surface of the earth, hydrogen can also be found in a variety of compounds, such as molecules, acids, and hydroxides.

Hydrogen retail costs ranged from $8.50/kg to $10.80/kg more than gasoline prices in 2021 for hybrid or traditional gasoline vehicles, respectively, matching a same gasoline cost per mile. Since hydrogen has been utilized in industry for more than 80 years, it is highly developed.

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4.2 moles of PO4 contains 399g of PO4

As, Atomic mass of PO4 = 31g + 64g = 95g

1 mole of PO4 contains --> 95g of PO4

4.2 mole of PO4 contains --> 399g of PO 4

The balanced half-reactions for the oxidation and reduction in the reaction 2Fe + 3[tex]I_2[/tex] → 2[tex]Fe_3[/tex] + 6[tex]I^-[/tex] are Fe(s) → [tex]Fe^{3+}[/tex](aq) + 3[tex]e^-[/tex] and 3[tex]I_2[/tex](s) + 6e → 6[tex]I^-[/tex](aq) respectively.

The balanced half-reactions for the oxidation and reduction that happen in the reaction 2Fe + 3[tex]I_2[/tex] → 2[tex]Fe^{3+}[/tex] + 6[tex]I^-[/tex] are as follows:

Oxidation half-reaction (Fe → [tex]Fe^{3+}[/tex]):

Fe(s) → [tex]Fe^{3+}[/tex](aq) + 3[tex]e^-[/tex]

Reduction half-reaction (I2 → I^-):

3[tex]I_2[/tex](s) + 6e → 6[tex]I^-[/tex](aq)

The oxidation half-reaction describes the oxidation of iron (Fe) to iron(III) ion ([tex]Fe^{3+}[/tex]). In this process, Fe loses 3 electrons, becoming [tex]Fe^{3+}[/tex].

The reduction half-reaction describes the reduction of iodine ([tex]I_2[/tex]) to iodine ions ([tex]I^-[/tex]). In this process, iodine gains 6 electrons, becoming [tex]I^-[/tex].

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The 38.945 kJ/mol is the activation energy .

What is moles ?

The mole, denoted by the sign "mol," is the volume of a system that has the same number of atoms in 0.012 kilograms of carbon-12 as there are elementary particles.  Similar to how having a dozen eggs says you have twelve eggs, having a mole of something indicates that you have 602,214,076,000,000,000,000,000 of that particular thing.

What is activation energy ?

Even simply getting started takes some energy from them. This force is referred to as activation energy. An automobile engine, for instance, requires activation energy to start. When the key is turned, a spark is produced, starting the engine's burning of gasoline.

It is found that in a chemical reaction, rate constant of the reaction nearly doubled with the rise in temperature by every 10 degree. The temperature dependence  of the rate constant can be explained by Arrhenius equation.

k = A e-Ea /RT

where k = rate constant

A = Arrhenius factor

Ea = Activation energy in Joule/mole

R = Universal gas constant

T = Temperature in Kelvin

Taking natural logaritham

ln k = -Ea / RT + lnA [ lnAB = lnA+ lnB & ln ex = x]

Let k1 and k2 be the rate constants at temperatures T1 and T2 respectively,

then,

ln k1 = -Ea /RT1 + lnA --------------(1)

ln k2 = -Ea /RT2 + lnA --------------(2)

Subtracting (1) from (2)

lnk2- ln k1 = -Ea / R x [ (1/T2 ) - (1/T1)]

ln(k2/k1) = Ea/R x [ (1/T1)- (T2)]-------- [ lnA - lnB = ln(A/B)]

log (k2/k1) =Ea / 2.303R x [ T2- T1 / T1T2] ----- [ natural logarithm can be converted to common logarithm by multiplying with 2.303]

Here T1= 255K

T2 = 265 K

T2- T1 = 265K - 255K

= 10 K

Here the rise in temperature is 10 degree, so the rate constant is to be doubled

That is   k2 = 2 k1

or k2/k1 = 2

R = 8.314 J K-1mol -1

Substituting the values,

log 2= Ea / 2.303x 8.314 x[ 10/255x265]

0.3010= Ea / 19.147 x 10/ 67575 [log 2= 0.3010]

Ea = (0.3010 x19.147x67575) / 10

=38945 Joules/mol

or

Ea = 38.945 kJ/mol

Thus activation energy (Ea) of 38.945kJ/mol is required to double the rate constant for the given reaction

Therefore, 38.945 kJ/mol is the activation energy .

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The dose of CaCl₂ are administered in an injection of 5.0mL of a 5.0% (w/v) solution and how many milliequivalents of Ca2+ is 0.09 grams or 4.51 mEq.

An unsafe abnormal heart rhythm (arrhythmia), which develops when the heart's electrical system isn't functioning properly, is what leads to cardiac arrest. Some abnormal heart rhythms prevent the heart from properly pumping blood throughout the body, though not all of them are life-threatening.

A%(w/v) indicates mass of solute dissolved in 100 mL of solution.

So,

Mass of CaCl₂ in solution = 5% (w/v) of 5.0 mL

Mass of CaCl₂ in solution = (5.0 g / 100 mL) x 5.0 mL= 0.25 g

Now, moles of CaCl₂ = Mass / molar mass

Now, moles of CaCl₂ = 0.25 g / 110.9834 g mol⁻¹ = 0.002253 mol

1 mol CaCl2 has 1 mol Ca2+. So, moles of Ca2+ in the solution must be equal to the moles of CaCl2.

So, Ca2+ in the solution = 0.002253 mol

Now,

Mass of Ca²⁺ in the solution = Moles x Molar mass

Mass of Ca²⁺ in the solution = 0.002253 mol x 40.078 g mol⁻¹

Mass of Ca²⁺ in the solution = 0.090279 g = 90.279 mg

Hence, mass of Ca²⁺ in solution = 0.09 g

2. mEq of Ca²⁺ = (mass in mg x Valence) / Formula weight

mEq of Ca²⁺ = (90.279 x 2) / 40.078 = 4.51

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The enthalpy change for the following reaction:

CH4 + 2O2 = CO2 + 2H2O is (-890) kJ/mol and it is exothermic

The bond enthalpy values for the reactants and products can be used to calculate the enthalpy change for the following reaction:

CH4 + 2O2 = CO2 + 2H2O

The bond enthalpies for the individual bonds in each molecule are:

CH4: C-H bond enthalpy = 413 kJ/mol

H-H bond enthalpy = 436 kJ/mol

O2: O=O bond enthalpy = 498 kJ/mol

CO2: C=O bond enthalpy = 799 kJ/mol

H2O: H-O bond enthalpy = 463 kJ/mol

To calculate the overall enthalpy change for the reaction, we need to add up the bond enthalpies for the reactants and subtract the bond enthalpies for the products.

The enthalpy change for the reaction is calculated as follows:

(1*(C-H bond enthalpy + 3H-H bond enthalpy) + 2(O=O bond enthalpy)) - (1*(C=O bond enthalpy) + 2*(2*H-O bond enthalpy))

= (1*(413 + 3436) + 2498) - (1799 + 2(2*463))

= (-890) kJ/mol

So this reaction is exothermic.

Therefore, the correct answer is as given above

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The IUPAC designation for the halogenated chemical with the following structural formula will be trans-1,3-Dichlorocyclohexane.

The longest chain of carbons connected by a single bond, whether in a continuous chain or a ring, serves as the foundation for IUPAC nomenclature. Any variations, whether involving numerous bonds or atoms other than carbon and hydrogen, are indicated by prefixes or suffixes in accordance with a particular set of priorities.

Thus, the IUPAC name is 2,5,5-trimethyl-2-hexene. The longest chain in example (2) that contains both carbon atoms from the double bond is five atoms long. There is a seven-carbon chain present, however there is only one double-bonded carbon atom in the chain. Consequently, this compound's root name will be

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The question in a investigation is the problem that we are asked to find and the hypothesis states what we thinks the answer to that question.

In a scientific experiment, the problem on which we work to solve or the question addressing an unknown thing is called a scientific question. The scientific question have to be precise and experientable.

A scientific hypothesis is a predictive statement describing the possible answer of the problem under study based on the observations and some previous scientific reports.

A hypothesis must be rectifiable, testable and falsifiable. We are checking whether our hypothesis is true or false through an experiment. Hence, second option is correct.

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1. 2SO2 + 2H2 ➡️ 2H2S + 2H20

2. CaCl2 + Na2CO3 ➡️ CaCO3 + 2NaCl

3. 2HNO3 ➡️ NO2 + H2O + 02

4. 12Al + H2SO4 ➡️ A12(SO4)3 + H2

In general, the solubility of compounds containing the carboxylic acid group (COOH) can be increased by reacting a carboxylic acid with sodium hydroxide option - b is correct answer.

Water does not form dimers when carboxylic acids are added. Instead, hydrogen bonds are created between the water molecules and the individual acid molecules. These interactions allow for the dissolution of carboxylic acids to create acidic solutions in water.

Similar to alcohols, aldehydes, and ketones, carboxylic acids are soluble in water. Acids with fewer than five carbons dissolve in water, but those with a higher molecular weight are insoluble because their larger hydrocarbon portion is hydrophobic.

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Answer:

I believe it's when they share electrons

Explanation:

The correct response is B. oxygen-hydrogen. Compared to H, O has the highest polarity.

An electric dipole moment with a negatively charged end and a positively charged end is present in polar molecules or chemical groups. Electric charge is separated by polarity. Polar compounds are those that have one or more polar bonds because the electronegativity of the bound atoms varies. Molecules with polar bonds are not polar if the bond dipoles cancel one another through symmetry. Polar molecules communicate with one another via hydrogen bonds and dipole-dipole intermolecular forces. Polarity is the basis for a number of physical properties, such as surface tension, solubility, melting and boiling points. Despite having a zero net charge, water is polar because of the way its molecules are structured. The molecule has ends that are positive for hydrogen and negative for oxygen. As a result, water molecules are attracted to other polar molecules as well as to one another.

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C. CaCl₂ (aq) and K₂CO3(aq)  will produce a precipitation reaction among the following.

A precipitation reaction is a type of chemical reaction in which an insoluble solid (precipitate) is formed from two or more soluble compounds. The formation of a precipitate is often indicated by a change in the color of the solution or by the appearance of a solid.In option C, CaCl2 and K2CO3 are both dissolved in water and when they are mixed, a precipitation reaction occurs, where the calcium ions in CaCl2 react with the carbonate ions in K2CO3 to form solid calcium carbonate (CaCO3), which is insoluble in water. Thus, it will precipitate out of the solution as a solid. Option A, LINO3 and Nal, and option B, HNO3 and Sn(OH)2, are both acid-base neutralization reactions, in which an acid and a base react to form water.

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In the provided question, [tex]-1.383 \times 10^{-11}[/tex] Joules is the equivalent energy of the mass defect of an atom of [tex]\rm _8 ^{18}O[/tex] .

The mass defect is the difference between the mass of an atom's nucleus and the sum of the masses of its individual protons and neutrons.

The mass of an atom of [tex]\rm _8 ^{18}O[/tex] is 17.99916 u. The sum of the masses of its eight protons (1.00728 u each) and ten neutrons (1.00867 u each) is 16.99776 u. Therefore, the mass defect is:

Δm = (mass of nucleus) - (sum of masses of protons and neutrons)

Δm = 17.99916 u - 16.99776 u

Δm = 0.0014 u

The equivalent energy ([tex]\rm E_b[/tex]) of the mass defect can be calculated using Einstein's famous equation:

[tex]\rm E=mc^2[/tex], where E is energy, m is mass, and c is the speed of light.

[tex]\rm E_b[/tex] = Δm [tex]\rm \times c^2[/tex]

where c is the speed of light, which is approximately [tex]3.00 \times 10^8[/tex] m/s.

Plugging in the values, we get:

[tex]\rm E_b[/tex]= [tex]\rm (0.0014 \ u) \times (1.66 \times 10^{-27 }\ kg/u) \times (3.00 \times 10^8 \ m/s)^2[/tex]

[tex]\rm E_b = -1.383\times 10^{-11} J[/tex]

Therefore, the equivalent energy ([tex]\rm E_b[/tex]) of the mass defect of an atom of  [tex]\rm _8 ^{18}O[/tex] is [tex]-1.383 \times 10^{-11}[/tex] Joules.

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The pressure of the car tire in December will be 259.7 kPa.

The pressure of a given mass of gas is directly proportional to the temperature of the gas.

Hence, the relationship between pressure and temperature is that the pressure increases with temperature.

The pressure of the car tire in December is determined as follows:

P₁/T₁ = P₂/T₂

where;

P₁ is the initial pressure

T₁ is the initial temperature

P₂ is the final pressure

T₂ is the final temperature

The pressure of the car tire in December = 300 * (273 - 15) / (25 + 273)

The pressure of the car tire in December = 259.7 kPa.

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Answer: Here is your answer Abraham Lincoln was a basketball player for the New York Knicks in 1642 He got drafted by the washinton capitals in 1707 and now he's currently still alive living in 2030.

Explanation:

Answer:

Solid piece of ice.

Explanation:

Solid piece of ice can easily melt due to heat radiation

The rate at which an enzyme-catalyzed reaction takes place is faster than that of an uncatalyzed reaction.

Structure of organisms as enzymes allow our bodies' phase changes, or combustion, to progress more quickly. Others are broken down while others are built. Enzymes exist in every living organism. Enzymes are created in our bodies by nature.

Foods that naturally contain digestive enzymes include kefir, sauerkraut, kimchi, miso, kiwifruit, mangoes, pineapples, papayas, mangoes, honey, bananas, avocados, and ginger. A diet that includes any of these foods may assist to improve gut health and digestion.

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Each atom's valence electrons added together make up the total number of electrons in a molecule's Lewis structure.

The smallest unit of a material, a molecule is made up of two or more atoms that are joined by chemical bonds and preserve the structure and characteristics of the larger substance. Chemistry is built on molecule-level principles. A subscript indicating the number of atoms is used after the element symbol to identify molecules.

Atoms are singular, uncharged particles. By bonding together two or more atoms, molecules are neutral particles. Ions are charged particles, either positively or negatively.

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Co(NH3)4Cl2] Due to the presence of 2 Cl- and 4 NH3 in the coordination sphere, Cl has a coordination number of 6. By counting the number of atoms bonded to an atom, one can determine the coordination number of a molecule or polyatomic ion (note: not by counting the number of chemical bonds).

Because there are a total of six atoms, ions, or molecules linked to the center atom, Cr, it has coordination number 6 once more. Because en (ethylenediamine) are bidentate ligands, the coordination number Co is 6 in the complex ion [Co(en)3]3+. A single metal core can be reached by both atoms working together. The cobalt(III) ion has a coordination number of six and is one of three bidentate en ligands in the complex [Co(en)3]3+.

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Answer:

ask a pro

Explanation:

hope this was helpful

One mole of sulphur contains 6.02 × 10²³ S atoms . Hence, 1 atom is equivalent to 1.6 × 10⁻²⁴ moles of S .

One mole of a substance is its amount containing 6.02 × 10²³  atoms or molecules. This number is called Avogadro number. One mole of every elements contains Avogadro number of atoms.

Similarly one mole of every compound contains 6.02 × 10²³  molecules. The mass of one mole of compound is called its molar mass.

S is 16th element in periodic table. S is nonmetal.  One mole of S contains 6.02 × 10²³ S atoms . Hence number of moles of one atom :

1/ 6.02 × 10²³  =  1.6 × 10⁻²⁴ moles

Hence, there will be  1.6 × 10⁻²⁴ moles  S in one atom of sulphur.

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The toaster's internal energy reduces as a result of heat entering the bread, hence response option B is correct. For A toaster is used to toast a piece of bread.

When the temperature rises and when a state or phase changes from solid to liquid or liquid to gas, internal energy increases as well. Planetary bodies can be compared to a hybrid of a heat engine and a heat reservoir. Internal energy E is kept in the heat reservoirs. The whole amount of energy that a thermodynamic system has inside of it is known as internal energy. It is the energy required to develop or prepare the system in its current internal condition, and it comprises both internal kinetic energy and potential energy contributions. The net thermal energy of a system is referred to as heat energy.

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the standard genetic code, in which a group of three nucleotides codes for the synthesis of a particular amino acid.

The standard genetic code, in which a set of three nucleotides specifies how an amino acid will be synthesised. DNA is a type of. DNA molecules' nucleotide sequences, which is how live cells' genetic information is carried in those molecules.

An amino acid is encoded by a codon, a triplet of nucleotides. An amino acid is encoded by each trio of nucleotides. The degenerate code consists of 20 amino acids and 64 combinations of four nucleotides taken three at a time (more than one codon per amino acid, in most cases).

A triplet code would therefore be the smallest set of four bases capable of encoding all 20 amino acids.

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Answer:

B. polishing a gemstone

Explanation:

the chemical makeup of the gemstone remains the same, whether polished or not. no reactions occured during that course of action, so it would definitely be considered a physical change.

hope this helped, good luck!

Answer:

a

Explanation:

because sodium and chlorine are in a solid form

One of the reactants is H2O2, therefore raising its concentration would accelerate the process.

As the reactant concentration increases, more reactant particles are moving together. The reaction rate will increase since there will be more collisions. The concentration of the reactants will affect how quickly a reaction proceeds.

A higher concentration of H2O2 would speed up the reaction because it is one of the reactants.

b. As the amount of water increases, the concentration of the reactant falls, which lowers the rate.

S2O3- is one of the reactants, hence boosting its concentration would accelerate the reaction.

d. Starch is solely utilized as an endpoint indication. On the rate, there is no difference.

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A summary of the C4 plants is given below:

The Hatch-Slack pathway, also known as C4 carbon fixation, is one of three recognized photosynthetic carbon fixation pathways in plants.

The names are a result of Marshall Davidson Hatch and Charles Roger Slack's discovery in the 1960s that some plants, when given 14CO2, integrate the 14C label into four-carbon molecules first.

Corn, sorghum, sugarcane, millet, and switchgrass are examples of C4 plants. C3 plants are often more prolific and efficient at photosynthesizing in cooler conditions because C4 morphological and biochemical adaptations demand more energy and resources from the plant.

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The number of CaSO4 molecules in 2.9 moles is 17.458 x 10^23.

Avogadro's number or Avogadro's constant refers to the quantity of units contained in one mole of any substance. The value is 6.0221408571023. Depending on the nature of the reaction and the substance, the units may be electrons, ions, atoms, or molecules.

Number of moles X Avogadro’s number => Number of molecules

number of CaSO4 molecules => 2.9 x 6.02 x 10^23

                                                  => 17.458 x 10^23 molecules.

The amount of atoms, molecules, or other particles that make up one mole of a substance is known as Avogadro's Number. One mole of hydrogen, for instance, is represented by 6.022 x 1023 hydrogen atoms.

Thus, the mole and the number 6.022 1023 mol1 were invented by Avogadro, Horstmann introduced the idea of the mole into science/chemistry, and Loschmidt and Than were the researchers who first determined Avogadro's number.

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Water and sodium metal react violently to form sodium hydroxide and hydrogen gas. Both hydrogen gas, solid metal itself may spontaneously ignite due to the exothermic heat produced by this reaction.

Sodium hydroxide is also known as caustic soda and lye. It is a common component of cleansers and soaps. At room temperature, sodium hydroxide is essentially a simple white, odorless solid. Hydroxide is a liquid that has no color or smell. Water can ignite explosive reactions when combined with appropriate acids.

Manufacturers use the chemical sodium hydroxide to create items including soap, rayon, newspaper, explosives, pigments, and crude oil. Hydrochloric acid is also used for cleaning and preparing metal, coating with oxide, electroplating, and electromechanical recovery.

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The expression for the solubility product constant for Cr₂(CO₃)₃ is

Ksp = [Cr³⁺] [CO₃⁻²]³

The equilibrium constant for the dissolution of a solid substance in an aqueous solution is the solubility product constant, Ksp. The amount that a solute dissolves in solution is what it represents. A substance's Ksp value increases with its degree of solubility.

The solubility product, also known as K s p, is a physical quantity. When a solid material dissolves in a liquid or aqueous solution, it serves as the equilibrium constant for equations.

Cr₂(CO₃)₃ → 2Cr³⁺(aq) + 3CO₃⁻²(aq)

Ksp = [Cr³⁺] [CO₃⁻²]³

Solubility product constant is product of concentrations of ions formed and power on concentration is stoichiometry coefficient.

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