The net ionic equation for the reaction is [tex]$\mathrm{CsH_5NH^+ + OH^- \rightarrow CsH_5NH_2^+ + H_2O}$[/tex]. The quantity in moles of [tex]$\mathrm{CsH_5NH^+}$[/tex] present at the start of the titration is 0.00440 mol. The quantity in moles of [tex]OH^-[/tex] present if 12.0 mL of [tex]OH^-[/tex] were added is 0.00289 mol.
a) The net ionic equation for the reaction is:
[tex]$\mathrm{CsH_5NH^+ + OH^- \rightarrow CsH_5NH_2^+ + H_2O}$[/tex]
b) The quantity in moles of [tex]CsH_5NH^+[/tex] present at the start of the titration can be calculated using the formula:
moles = concentration x volume
moles of [tex]CsH_5NH^+[/tex] = 0.220 mol/L x 0.0200 L = 0.00440 mol
c) The quantity in moles of [tex]OH^-[/tex] that would be present if 12.0 mL of OH- were added can be calculated using the formula:
moles = concentration x volume
moles of [tex]OH^-[/tex] = 0.241 mol/L x 0.0120 L = 0.00289 mol
d) After the reaction goes to completion, [tex]CsH_5NH^+[/tex] would be converted to [tex]CsH_5NH^+[/tex] and there would be no [tex]OH^-[/tex] left in the solution.
e) The quantity in moles of [tex]CsH_5NH^+[/tex] that would be left in the beaker after the reaction goes to completion can be calculated using the formula:
moles = initial moles - moles reacted
moles of [tex]CsH_5NH^+[/tex] = 0.00440 mol - 0.00289 mol = 0.00151 mol
f) The quantity in moles of CHEN that are produced after the reaction goes to completion is equal to the moles of [tex]OH^-[/tex] that reacted since the reaction is a 1:1 stoichiometric ratio. Therefore, the quantity in moles of CHEN produced is 0.00289 mol.
g) To determine the pH of the solution after the reaction goes to completion and the system reaches equilibrium, we need to calculate the concentration of [tex]H^+[/tex] ions in the solution. This can be done using the formula for the acid dissociation constant (Ka):
[tex]$\mathrm{K_a = \frac{[H^+][CsH_5NH^+]}{[CsH_5NH]}}$[/tex]
We know the values of Ka and the initial concentrations of [tex]CsH_5NH^+[/tex] and [tex]CsH_5NH[/tex], so we can rearrange the equation and solve for [[tex]H^+[/tex]]:
[tex]$\mathrm{[H^+] = \sqrt{\frac{K_a \times [CsH_5NH]}{[CsH_5NH^+]}}}$[/tex]
[tex]$\mathrm{[H^+] = \sqrt{\frac{5.9 \times 10^{-6} \times 0.220}{0.00440-0.00289}}}$[/tex]
[tex][H^+] = 0.000826 M[/tex]
[tex]$\mathrm{pH = -\log_{10}[H^+]}$[/tex]
[tex]$\mathrm{pH = -\log_{10}(0.000826)}$[/tex]
pH = 3.08
Therefore, the pH of the solution after the reaction goes to completion and the system reaches equilibrium is 3.08.
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what are the answers?
·· ··
The balanced equation was found to be Na· + ·Cl : ---------> Na + (: cl : )-
.. ..
Define ionic bond dot diagram ?
Group 8 elements, generally known as noble gases, are noted for their inertness. They hardly never react with other elements, such as water, oxygen, or metals. This is due to the fact that they all have a complete outer shell of electrons. This is the most stable electron configuration possible for an atom.
Other elements, on the other hand, do not have this stable electron configuration. Instead, in order to obtain that ideal arrangement, they must acquire, lose, or share electrons. Ionic bonding is one method for doing this.
the answer for the ionic bond dot diagram for the Nacl was found to be.
·· ··
Na· + ·Cl : ---------> Na + (: cl : )-
.. ..
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What is the mass in grams of 2.3 moles of barium sulfate?
Answer:
536.79608
Explanation:
1. Examine the IR spectrum of cis-norbornene-5,6-endo-dicarboxylic anhydride, (Fig.48.8, pp. 630): what do the signals at 1750 cm-1 and 1838 cm-1 indicate?
2. Explain the following questions regarding the possible contamination of the final isolated product with dicyclopentadiene (the cyclopentadiene dimer).
a. Since "cracked" cyclopentadiene can spontaneously dimerize back to dicyclopentadiene, could the dimer be formed as an unwanted "by-product" during the experiment?
b. How does the experimental procedure minimize contamination of the final isolated (desired) product with this (undesired) "by-product"?
1) anhydride normal peaks (1760 and 1810 cm-1) there are two peaks for anhydrides at the above freq. our peaks are at 1759 cm-1 and one at 1838 cm-1 (cyclic anhydride 5 membered ring again increases freq. upto 30 cm-1).
So, the peak at 1838 cm-1. electronegetive oxygen atom (inductive effect) between two carbonyl group increases the freq, while resonanse lowers the freq.
2) While cracking the dimer it will give us monomer which then reacts with maleic anhydride to give Diels-Alder product, it does not give any unwanted product at higher temperature. if cracked monomer reacted at low temp. or it does not reacted immediately with maleic anhydride then unwanted product will be obtained
3) breaking the dimer at high temperature and it is to be reacted immediately can isolate the pure prodict.
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Draw the Lewis structure for CH5N. How many lone pairs does it have?
Lewis structure for CH₅N has one lone pair.
A lone pair, also known as an unshared pair or a non-bonding pair, is an unshared pair of valence electrons that are not shared with another atom in a covalent bond in chemistry. Atoms' outermost electron shell contains lone pairs. The Lewis structure can be used to locate them. Therefore, if two electron pairs are coupled but are not utilized in chemical bonding, they are referred to as lone pairs. As a result, the amount of valence electrons surrounding an atom is equal to the sum of the electrons in lone pairs and those in bonds.
In the valence shell electron pair repulsion theory (VSEPR theory), which describes the morphologies of molecules, the idea of a lone pair is employed. They are also mentioned in relation to Lewis acids and bases in chemistry. Chemists do not, however, always classify non-bonding electron pairs as lone pairs. Examples include transition metals, where non-bonding pairs are believed to be stereochemically inactive and do not affect molecular shape. The idea of a lone pair is less clear in molecular orbital theory (completely delocalized canonical orbitals or localized in some way), as the relationship between an orbital and the elements of a Lewis structure is sometimes not clear-cut. However, orbitals that are largely nonbonding or that are occupied are typically classified as lone pairs.
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bonding theories and molecular geometry lab
Valence bond theory, Lewis theory and the molecular orbital theory are the three bonding theories in chemistry. Molecular geometry is the three dimensional arrangement of atoms in the molecule.
Bonding theories are the vital postulates in chemistry that provide the basic information regarding the bonds present in a particular molecule. Three bonding theories are Lewis theory, valence bond theory, and molecular orbital theory. In Lewis theory, the electrons and lone pairs are symbolized as dots surrounding the atom. In valence bond theory, electrons are shared among orbitals of atoms, that forms bonds. In molecular orbital theory, two atomic orbitals combine to make a molecular orbital. Bonding theories are very significant as they maintain the orientation in a bond. They provide information on the sort of bond present in the molecule, the sort of bonding taking place to form a simple or complex compound.
Molecular geometry is also known as the molecular structure. It is the three-dimensional structure or arrangement of atoms in a molecule. Helps to understand the molecular structure of a compound. It helps to determine the polarity, reactivity, phase of matter, color, magnetism, as well as the biological activity.
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The complete question is,
Explain bonding Theories and molecular geometry.
Can someone please help me! No false answers please!!
The formula for a substance is D4 and its molar mass is 30 g. A student is given 150 g of the substance and is asked how many atoms are in the sample. She says there are 5 times Avogadro's number (6.022 x 102) of atoms in her sample. The student is in error, identify her error and explain what the correct answer should be.
The student's error is that she is assuming that the number of atoms in a sample is directly proportional to the mass of the sample. Avogadro's number (6.022 x 10²³) represents the number of atoms or molecules in one mole of a substance. However, the number of atoms in a given mass of a substance depends on the molar mass (mass per mole) of the substance, not the Avogadro's number.
The correct way to determine the number of atoms in a sample is to use the formula:
number of atoms = mass of the sample / molar mass
In this case, the molar mass of the substance is 30 g/mol, so the number of atoms in 150 g of the substance is:
number of atoms = 150 g / 30 g/mol = 5 mol
The correct answer is 5 moles of atoms, which is not equal to 5 times Avogadro's number. Therefore, the student's answer is incorrect.The student's error is that she is assuming that the number of atoms in a sample is directly proportional to the mass of the sample. Avogadro's number (6.022 x 10²³) represents the number of atoms or molecules in one mole of a substance. However, the number of atoms in a given mass of a substance depends on the molar mass (mass per mole) of the substance, not the Avogadro's number.
The correct way to determine the number of atoms in a sample is to use the formula:
number of atoms = mass of the sample / molar mass
In this case, the molar mass of the substance is 30 g/mol, so the number of atoms in 150 g of the substance is:
number of atoms = 150 g / 30 g/mol = 5 mol
The correct answer is 5 moles of atoms, which is not equal to 5 times Avogadro's number. Therefore, the student's answer is incorrect.
can anyone help me with this question?
If the weight in gm of the sample is 0.040 moles of salt (NaCl) then Molar mass of NaCl = 58.44 g/mol.
Define molar mass?The ratio between the weight and the amount of substance in any sample of a chemical compound is known as the molar mass of that compound. The molar mass of a compound is a bulk property instead of a molecular one.
By using formula: n=m / M m=n×M
m=(0.040)x(58.5) m=2.34g
So,
It means that if we prepare a 100cm3 solution using 2.34g of NaCl, the solution's concentration will be 0.500 mol/dm3.
Molar mass of Nacl = 58.44 g/mol
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Using the solubility rules in your Reference Tables (page 6), which of the following reactions would occur?
A. CaBr2 + 2KNO3 --> Ca(NO3)2 + 2KBr
B. Ca(NO3)2 + 2HCl --> CaCl2 + 2HNO3
C. 3CuBr3 + 2AlCl3 --> 3CuCl2 + 2AlBr3
D. 3AgNO3 + K3PO4 --> Ag3PO4 + 3KNO3
Answer: Option b is correcr
Explanation: ption A: The relevant solubility rule is: Compounds with halides are soluble except when with silver, lead, or mercury. Therefore the products of this reaction are all soluble and the reaction will not occur as no precipitate is made.
Option B: In addition to the solubility rule stated in Question A, all nitrates are soluble. Therefore the products of this reaction are all soluble and the reaction will not occur as no precipitate is made.
Option C: Based on the solubility rules already mentioned, the products of this reaction are all soluble and the reaction will not occur as no precipitate is made.
Option D: Most compounds of phosphate are insoluble with exceptions being with ammonium and some Group 1A metals. Based on this, the silver phosphate
Ag will be insoluble and form a precipitate. Therefore this reaction will occur and Option D is the correct answer
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When HBr is added to 2-methyl-1,3-butadiene to produce singleaddition products, two products are obtained as shown below. Usinga reaction coordinate diagram and your knowledge of kinetic andthermodynamic control, explain why compound I is formed ingreatest abundance at low temperature and compound II is formed asthe major product at high temperature.
Low temperatures cause the reaction to move in the direction of the product that will produce the Compound 2 is more stable at the high temperature since it is the more substituted alkene.
A substance made up of two or more components is called a compound. Table salt, water, and carbon dioxide are a few examples of compounds. The two fundamental categories of compounds are. The way the atoms in the molecule bond to one another defines who we are. Salt compounds and molecular compounds are two examples of these categories. a material created by chemically joining two or more distinct components. Examples of compounds are table salt (NaCl), which is generated from the elements sodium and chloride, and water (H2O), which is created from the components hydrogen and oxygen.
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2. Most of the elements in groups 16 through 18 are classified as
a. alkali metals.
c. nonmetals.
b. inner transition metals.
d. alkaline earth metals.
The correct option c. nonmetals. Nonmetals make up the majority of the elements of groups 16 through 18.
Explain the properties of elements of groups 16 through 18.The position of an element on this periodic table has a significant impact on how that element is defined.
On the periodic table, there are a total of eight columns that seem to be taller than every other column. The primary group consists of those eight towering columns. Each element in the core group has a significant propensity to generate ions with predictable outcomes. The primary group elements constantly create charge between +1 and -4 based on the group number.Elements of groups 16 through 18:
Non-metals make up the elements of groups 16 through 18. These elements mostly exist as vapors or fragile solids. They frequently function poorly as heat and electricity conductors. These non-metals are frequently gases at ambient temperature since they are known to have substantially lower melting temperatures than metals.To know more about the elements, here
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What is the temperature of a hot day in the desert? Select the better estimate. 47C 47F
Temperature. The desert reaches an average daily temperature of 38°C (just over 100°F). Desert nighttime temperatures typically drop below -3.9°C (approximately 25°F).
What is the desert's highest temperature?
The world's hottest air temperature was recorded at Death Valley: A scorching 56.7°C (134.1°F) was recorded on July 10, 1913, in the California desert's aptly called Furnace Creek location. Meanwhile, the average summer temperature frequently exceeds 45°C (113°F).
What is the desert's lowest temperature?
Desert surfaces lose nearly twice the same or more heat at night as humid ones do and receive slightly more than twice as much solar energy. Many average annual temperatures fall between 20 and 25 °C. The extreme maximum temperature is between 43.5 and 49 degrees Celsius. At times, the minimum temperature falls below -18 degrees Celsius.
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the compound being dissolved into a liquid ___
How many formula units are in 4.43 g of N2 molecules?
There are 9.6 * 10^22 formula units in 4.43 grams of the nitrogen molecule.
What is the number of the formula units?We know that the number of the formula units that we have can easily be obtained from the use of the Avogadro's hypothesis. Let us note that we can see that there are 4.43 g of the nitrogen molecules.
We have the number of moles of the nitrogen molecules as;
Number of moles = mass/molar mass
= 4.43/28 g/mol
= 0.16 moles
If 1 mole of the molecule contains 6.02 * 10^23 formula units
0.16 moles would contain 0.16 * 6.02 * 10^23/ 1
= 9.6 * 10^22 formula units
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Cat or Dog?
Zebra or Tiger?
China or NYC?
Sing or Dance?
Exercise or Yoga?
Gaming or Study?
Cooking or Reading?
:3 bye hope you have a lovely day!
Answer:
Dog
Zebra
Sing
Yoga
Gaming
Cooking
Firt, once in the imulation, click on "olution value". Move the blue lever (olute amount) and (olution volume) to the required amount and find the molarity of the following:
1. Uing Drink Mix mode:
a. What i the molarity when. 772 mole are diolved in. 500 Liter of water?
b. What i the molarity when. 453 mole are diolved in. 450 Liter of water?
Using Drink Mix mode:
a. To find the molarity when 772 moles of a solute are dissolved in 500 liters of water, you can use the formula:
Molarity (M) = number of moles of the solute present in the solution / liters of solvent
Molarity (M) = 772 moles / 500 liters
= 1.544 M
b. To find the molarity when 453 moles of a solute are dissolved in 450 liters of water, you can use the formula:
Molarity (M) = number of moles of the solute present in the solution / liters of solvent
Molarity (M) = 453 moles / 450 liters
= 1.01 M
It's worth noting that molarity is a unit of concentration and is often used to describe the concentration of a solute in a solution. It is calculated as the number of moles of solute per liter of solvent.
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Based on the given information, which area is most likely to have more chemical weathering?
Based on the given information, the area that is most likely to have more chemical weathering is Area 1.
What is chemical weathering?
Rocks and soil undergo chemical weathering, which modifies their molecular structure. For instance, a procedure known as carbonation occurs occasionally when water and carbon dioxide from the air or soil combine. This results in carbonic acid, a weak acid that can dissolve rock.Solution, carbonation, hydration, oxidation, and reduction are key chemical weathering reactions. Through chemical reactions involving oxygen, surface and/or soil water, and various acids, these processes operate on the rocks to degrade, dissolve, or reduce them to a fine clastic form.The degradation of rock by chemical processes is referred to as chemical weathering, often known as decomposition or decay.Chemical weathering may also endanger human health by releasing harmful substances (such as excessive levels of arsenic, fluoride, heavy metals, etc.).To learn more about chemical weathering refer to:
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When two large groups are positioned at a dihedral angle of 180° in a staggered conformation, the product confirmation will be called Anti-conformation.
The angle would need to be 180 degrees for the anti-conformation. Additional staggered conformation, known as the anti conformation, is created by adding another 60 rotations. In this structure, the two methyl groups are placed in opposition to one another.
What does dihedral mean and what does it do?Dihedral, which is the upward angle of an aircraft's wings, makes the lower wing fly at a higher angle of attack than the higher wing, increasing lateral stability in a bank. In reality, it just means that you can fly more autonomously, especially during turbulence.
What in aviation is dihedral?The angle between an aircraft's left and right wings is known as dihedral in aeronautics. The impact of sideslip on the aircraft's rolling is also referred to as "dihedral."
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What is the result of DNA replication identical?
The result of DNA replication identical is two DNA molecules consisting of one new nucleotide chain and one old chain.
DNA replication is a process of doubling the DNA chain assisted by DNA polymerase enzymes in the interphase before mitosis. Prokaryotes carry out continuous DNA replication and eukaryotes carry out DNA replication in the S phase of the cell cycle before mitosis. DNA replication aims to produce new DNA that is identical to the parent cell's DNA so that DNA replication is described as semi-conservative.
The semi-conservative theory resulted in two DNA strands consisting of one old strand and one new double helix with exactly the same information as the old DNA. The result of DNA replication is two DNA molecules consisting of one new nucleotide chain and one old chain. That is why the results of DNA replication have the same or identical properties.
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Which type of soil has better water holding capacity and why?
A soil can hold more water if its surface area is larger. To put it another way, a fine soil, which is defined as soil with only a high proportion of clay and sediment particles, has a better capacity to hold water.
Explain what dirt is.The material that covers the surface of the ground, known as soil, is created as a result of the weathering of rock. Its principal constituents include mineral atoms, organic substances, air, water, and living things, all of which interplay slowly yet continuously.
Does dirt include soil?Although a lot of us could confuse the terms dirt and soil, they are distinct from one another thing. When it comes to nutrients or bacteria, dirt is frequently composed of clay, sands, silt, and pebbles.
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write Hypothesis (scientific reason):
"how does the temperature of substance affect on the concentration of sodium hydroxide solution?"
With rising temperatures, sodium hydroxide's solubility declines when dissolved in another solvent.
what does mean by solubility?Solubility refers to how easily a substance dissolves in a liquid to produce a solution (usually expressed as grams of solute per litre of solvent). One fluid's (liquid or gas) solubility in another can be complete (completely miscible; for example, methanol and water) or partial (oil and water only partly dissolve).
What three forms of solubility are there?Solutes are divided into three categories: highly soluble, sparingly soluble, and insoluble based on the concentration at which they dissolve in a solvent.
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Describe what is an "impossible" fraction. (
Answer:
something that is impossible
What is the molarity of the solution produced when 145 g of sodium chloride (NaCI) is dissolved in sufficient water to prepare 2.75 L of solution?
The molarity of the solution produced when the 145 g of sodium chloride (NaCI) is dissolved in the sufficient water to prepare the 2.75 L of solution is 0.90 M.
Given that :
Mass of the sodium chloride NaCl = 145 g
Volume of the NaCl = 2.75 L
The molar mass of the NaCl = 58.4 g/mol
The moles is given as :
Moles = mass / molar mass
Moles = 145 / 58.4
Moles = 2.48 mol
The molarity expression is given as :
Molarity = moles / volume in L
Molarity = 2.48 / 2.75
Molarity = 0.90 M
Thus, the molarity of KCl is 0.90 M.
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Please help, will give brainiest
QUESTION 1.
Element X on Planet Qatar has three known isotopes: X-121 with a relative abundance of 43.2%, X-123 with a relative abundance of 53.1%, and X-129 with a relative abundance of 3.70%. What is the average atomic mass in amu of Element X given this information?
QUESTION 2.
How did Rutherford's experiment change the way scientists had previously viewed atomic structure? How did this pave the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model?
QUESTION 3.
How is percent abundance related to average atomic mass?
Answer 1
The average atomic mass in a.m.u of Element X given this information is 122.358.
Answer 2
Rutherford's experiment change the way scientists had previously viewed atomic structure as it provided insight into atomic structure.
Rutherford's experiment paved the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model as his model of the atom, the structure of the nucleus became more well-defined following the discovery of protons (1919) and neutrons (1932) as the particle constituents of the nucleus.
Answer 3
The percent abundance is related to the number fraction as fi = Pi/100 and used as in the formula written above in order to find average mass
What is atomic structure?Atomic structure refers to the structure of an atom comprising a nucleus (centre) in which the protons (positively charged) and neutrons (neutral) are present.
The average atomic mass in a.m.u of Element X given this information is ((121 * 43.2) + (123 * 53.1) + (129 * 3.70)) / 100
=5227.2 + 6531.3 + 477.3
=12235.8 / 100
122.358
Rutherford's experiment change the way scientists had previously viewed atomic structure as it provided insight into atomic structure, and Rutherford's model of the atom was proposed as a small, positive, massive nucleus contains the very vast majority of the mass of the entire atom with negatively charged electrons surrounding it at relatively large distances.
Rutherford's experiment paved the way for subsequent changes up to and including the currently accepted quantum mechanical atomic model as his model of the atom, the structure of the nucleus became more well-defined following the discovery of protons in 1919 and neutrons in 1932 as the particle constituents of the nucleus.
It was during the 1920s that a "wave mechanical model" came along through the work of several physicists most importantly de Broglie, Heisenberg, and Schrodinger) and Bohr's concept of electrons "orbiting" the nucleus was abandoned in favor of "orbitals" which are more abstract probabilistic representations of electronic structure within an atom.
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Draw a Lewis diagram for the amine C2H5NH2
The carbon atom forms a 4 sigma bond and is SP 3 with tetrahedral geometry. It is also SP 2 hybridized with tetragonal planner geometry with a 3 sigma & 1 bond. an oxygen atom with two loan electrons
What does a carbon atom represent?A live organism's body, coal, a carbon dioxide particle, and other kinds of existence are only a few examples of the many various ways that carbon can exist. Carbon atoms can change their forms as a result of several processes. Carbon can appear in a variety of things, such as carbon dioxide, anthracite, a cow, sugar, and diamond.
What is a simple carbon atom?It is a non-metal, denoted by the symbol C. There are 6 protons, 6 neutrons, and, of course, 6 electrons in it. Because of its almost infinite capacity for bonding with other carbon atoms, a carbon atom is regarded as distinctive and unique.
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What is C in bohr’s equation?
Formula
[tex]\ell=\frac{n h}{2 \pi}[/tex]
[tex]\ell = angular \: momentum[/tex]
[tex]n = principal quantum number \\ h = Planck's constant \\ \pi = pi[/tex]
Turpentine (Csub10Hsub16) can react with chlorine gas to make carbon and hydrogen monochloride: Csub10Hsub16 (l) + 8Clsub2 (g) > 10C (s) + 16HCl (g) Suppose a chemist runs this reaction and makes 569g of carbon. How many grams of turpentine were consumed?
As per the given reaction, one mole or 136 g of turpentine produce 10 moles or 120 g of carbon. Then to produce 569 g of carbon 644.8 g of turpentine is required.
What is theoretical yield?The theoretical yield of a product in a reaction is determined using the balanced equation of the chemical reaction. Actual yield of the product might vary from the theoretical yield.
Given the balanced reaction of turpentine with chlorine gas producing carbon and HCl. Here, one mole of turpentine produces 10 moles of carbon.
molar mass turpentine = 136 g/mol
atomic mass of carbon = 12 g/mol
mass of 10 moles = 120 g
136 g of turpentine produces 120 g of carbon. Then, mass of turpentine required to produce 569 g of carbon is :
(136 × 569) /120 = 644.8 g
Therefore, the mass of turpentine consumed in the reaction is 644.8 g.
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How is the periodic table divided? (Where do we find metals, nonmetals and metalloids?)
Answer:
Explanation: you have to divide the simbles
the number of objects in a mole of something is dictated by which constant? One mole of a substance is equal to 6.022 xd7 10xb3 units of that substance (such as atoms, molecules, or ions). The number 6.022 xd7 10xb3 is known as Avogadro’s number or Avogadro’s constant. The concept of the mole can be used to convert between mass and number of particles.. Created by Sal Khan.
a. true
b. false
The given statement is true since the number of objects in a mole is dictated by a quantity called Avogadro's number.
Avogadro's number is quite an important quantity in chemistry as well as other branches of science. It tells us how many atoms are there in one gram atom of a compound, how many molecules are there in one gram molecule of a compound, and how many ions are there in one gram of ions in a substance.
It was discovered by the Italian scientist Amedeo Avogadro and thus, named after him. Its value is = 6 . 022 × 10²³ mol⁺¹ and its SI unit are the reciprocal of a mol (mol⁺¹). Hence, the given statement is indeed true.
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Please help chemistry
The calculated theoretical yield for the
reaction below was 54.25 g Al2O3. Instead,
only 16.81 g Al2O3 was collected. What is
the percent yield?
4AI + 302 → 2Al2O3
9.119
30.99
322.7
37.44
The percentage yield of the reaction from the given parameters would be 30.99%. Option B.
Percent yieldThe percent yield of a reaction is the actual amount of product formed relative to the theoretical amount of product that is supposed to be formed from the same reaction.
This is mathematically expressed as:
Percent yield = actual yield/theoretical yield x 100%
In this case: the actual yield = 16.81 g, the theoretical yield = 54.25 g
Thus, the percent yield of the reaction can be calculated as:
16.81/54.25 x 100% = 30.99%
In other words, the percent yield of the reaction would be 30.99%.
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Answer: B. 30.99%
Explanation:
What is the number of nitrogen molecules that reacted with excess hydrogen to make 2 x 10^10 molecules of ammonia? 3H2 + N2 <-------> 2 NH3 a. 2 x 10^10 b. 3 x 10^10 c. 5 x 10^9 d. 1x 10^10
The number of nitrogen molecules that reacted with excess hydrogen to make 2 × 10¹⁰ molecules of ammonia is 1 × 10¹⁰ molecules.
Given that :
The molecules of the Ammonia = 2 × 10¹⁰ molecules
The reaction is given as :
3H₂ + N₂ ⇄ 2NH₃
1 mol = 6.022 × 10²³ molecules
from the reaction it is clear that :
1 mole of the N₂ will produces the 2 mol of the ammonia.
therefore, 1 molecule of the nitrogen produces 2 mol of the ammonia
molecules of the nitrogen, N₂ = 2 × 10¹⁰ / 2
= 1 × 10¹⁰ molecules.
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