Question 1

2 CS1U1B14S1U1B0HS1U1B110S1U1B0 + 13 OS1U1B12S1U1B0 → 8 COS1U1B12S1U1B0 + 10 HS1U1B12S1U1B0O -The reaction was performed in the lab and 50.1 g of CO₂ was actually collected. The percent yield of this reaction is ________.

Accepted Answer

The answer of 2 CS1U1B14S1U1B0HS1U1B110S1U1B0 + 13 OS1U1B12S1U1B0 → 8...

Question 2

The ingredients to make 50 servings of fruit punch are: ∙ 2-1/2 cups white sugar
∙ 6 cups water
∙ 2 (3-ounce)packages strawberry flavored gelatin mix
∙ 1 (46-fluid-ounce)can pineapple juice
∙ 2/3 cup lemon juice
∙ 1 quart orange juice
∙ 2 (2-liter)bottles lemon-lime flavored carbonated beverage
How many servings of punch can you make using the above recipe, if you have 2 gallons of pineapple juice, 8 (2-liter)bottles of lemon-lime flavored soda and 2 gallons of orange juice? Assume you have plenty of all the other ingredients.

Accepted Answer

The answer of The ingredients to make 50 servings of...

Question 3

2 CS1U1B14S1U1B0HS1U1B110S1U1B0 + 13 OS1U1B12S1U1B0 → 8 COS1U1B12S1U1B0 + 10 HS1U1B12S1U1B0O -How many grams of CO₂ can be made from reacting 78.1 g of O₂ and 62.4 g of C₄H₁₀?

Accepted Answer

The balanced chemical equation is: 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O. The mole ratio of C₄H₁₀ to CO₂ is 2:8, or 1:4. Therefore, 62.4 g of C₄H₁₀ will react with 62.4 g / 58.12 g/mol * 4 mol CO₂ / 1 mol C₄H₁₀ * 44.01 g/mol CO₂ = 66.1 g CO₂.

Question 4

The number of atoms of a certain mass of any compound may be lower than the number of molecules of the same compound.

Accepted Answer

The answer of The number of atoms of a certain...

Question 5

What is the percent yield for a given process, if 4.0 kg of a product is recovered from a reaction whose theoretical yield is 5.6 kg?

Accepted Answer

% Yield = (Actual yield / Theoretical yield) x 100%
% Yield = (4.0 kg / 5.6 kg) x 100%
% Yield = 71%

Question 6

18 g of water have the same number of atoms as 48 g of ozone.

Accepted Answer

Both 18 g of water (H2O) and 48 g of ozone (O3) contain 1 mole each, based on their molar masses (18 g/mol for water and 48 g/mol for ozone). Since 1 mole of any substance contains Avogadro's number of molecules (6.022 x 10^23), and each molecule of water contains 3 atoms (2 hydrogen and 1 oxygen) and each molecule of ozone contains 3 oxygen atoms, both samples contain the same number of atoms when considering the total atoms present in the moles of each substance.

Question 7

2 CS1U1B14S1U1B0HS1U1B110S1U1B0 + 13 OS1U1B12S1U1B0 → 8 COS1U1B12S1U1B0 + 10 HS1U1B12S1U1B0O -Which reagent will be used up first if 78.1 g of O₂ is reacted with 62.4 g of C₄H₁₀?

Accepted Answer

To determine which reagent will be used up first, we need to use stoichiometry and compare the moles of each reagent to the amount of product that can be formed. First, we need to balance the equation to determine the molar ratios: 2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O Next, we will convert the masses of each reagent to moles: 62.4 g C₄H₁₀ x 1 mol / 214.34 g = 0.291 mol C₄H₁₀ 78.1 g O₂ x 1 mol / 268.38 g = 0.291 mol O₂ Whichever reagent has the smallest number of moles is the limiting reagent and will be used up first. In this case, both reagents have the same number of moles, so we need to compare the amount of product that can be formed from each reagent. Using the balanced equation, we can see that 13 moles of oxygen can produce 8 moles of CO₂, while only 2 moles of C₄H₁₀ can produce 8 moles of CO₂. This means that the amount of product that can be formed from the oxygen is much greater than the amount that can be formed from the C₄H₁₀. Therefore, oxygen is not the limiting reagent and will not be used up first. The correct answer is B) oxygen.

Question 8

K₄Fe(CNO)₆ has more atoms per molecule than Al(C₃H₅O₂)₃.

Accepted Answer

The answer of K₄Fe(CNO)₆ has more atoms per molecule than...

Question 9

The number of molecules of a certain mass of any compound is always higher than the number of moles of the same compound.

Accepted Answer

The number of molecules in a certain mass of a compound is determined by Avogadro's number, which is constant and equal to 6.022 x 10^23 molecules/mole. The number of moles is simply a unit of measurement that reflects the quantity of a substance, whereas the number of molecules is a direct count of the actual particles present in the sample. Therefore, the number of molecules is always higher than the number of moles for any given sample of a compound.

Question 10

One mole of methane has the same mass as half a mole of oxygen.

Accepted Answer

One mole of any substance contains the same number of molecules, which is Avogadro's number (6.022 x 10^23). The molar mass of a substance is the mass of one mole of that substance. The molar mass of methane (CH4) is 16 g/mol, and the molar mass of oxygen (O2) is 32 g/mol. Therefore, one mole of methane has the same mass as half a mole of oxygen.

Question 11

26 g of aluminum have the same number of atoms as 26g of iron.

Accepted Answer

The number of atoms in a substance depends on its atomic mass, not its weight. The atomic mass of aluminum (Al) is 26.98 g/mol, while the atomic mass of iron (Fe) is 55.85 g/mol. Therefore, 26 g of aluminum will have more atoms than 26 g of iron.

Question 12

The number of atoms in one molecule of (NH₄)₂Cr₂O₇ is 17.

Accepted Answer

The chemical formula given in the question does not follow standard chemical notation and has no meaning in chemistry. Therefore, it cannot be determined whether the number of atoms in one molecule is 17 or not.

Question 13

2 CS1U1B14S1U1B0HS1U1B110S1U1B0 + 13 OS1U1B12S1U1B0 → 8 COS1U1B12S1U1B0 + 10 HS1U1B12S1U1B0O -The reaction was performed in the lab and 50.1 g of CO₂ was actually collected. How many grams of the excess reactant are left over?

Accepted Answer

The answer of 2 CS1U1B14S1U1B0HS1U1B110S1U1B0 + 13 OS1U1B12S1U1B0 → 8...

Question 14

One mole of oxygen gas has fewer atoms than one mole of ozone gas.

Accepted Answer

The answer of One mole of oxygen gas has fewer...

Question 15

One mole of carbon monoxide has the same mass as one mole of nitrogen gas.

Accepted Answer

The answer of One mole of carbon monoxide has the...

Question 16

(NH₄)₄Fe(CNO)₆ has 36 atoms per formula unit.

Accepted Answer

(NH₄)₄Fe(CNO)₆ has 34 atoms per formula unit: 4 N, 16 H, 1 Fe, 6 C, 6 N, and 6 O.

Question 17

One molecule of oxygen gas has fewer molecules than one mole of ozone gas.

Accepted Answer

The answer of One molecule of oxygen gas has fewer...

Question 18

K₄Fe(CN)₆ and Al₂(SO₄)₃ have the same number of molecules per atom.

Accepted Answer

The subscript numbers after the letters represent the number of atoms of each element in the molecule. Both molecules have the same number of atoms of each element, and therefore the same number of molecules per atom.

Question 19

Which has more ions- 2.0 moles of Al₂(SO₄)₃or 3.0 moles of Na₃PO₄?

Accepted Answer

To determine which compound has more ions, we need to calculate the total number of ions in each compound. 2.0 moles of Al₂(SO₄)₃ contains 2 × (1 + 12 + 4 + 13) = 60 ions. 3.0 moles of Na₃PO₄ contains 3 × (1 + 13 + 1 + 14) = 87 ions. Therefore, option B is correct as it contains more number of ions than option A.

Question 20

What is the mass % of Sn in tin (IV)oxide?

Accepted Answer

The answer of What is the mass % of Sn...

Quiz 9: Stoichiometry and the Mole

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -The reaction was performed in the lab and 50.1 g of CO₂ was actually collected. The percent yield of this reaction is ________.

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -How many grams of CO₂ can be made from reacting 78.1 g of O₂ and 62.4 g of C₄H₁₀?

The number of atoms of a certain mass of any compound may be lower than the number of molecules of the same compound.

What is the percent yield for a given process, if 4.0 kg of a product is recovered from a reaction whose theoretical yield is 5.6 kg?

18 g of water have the same number of atoms as 48 g of ozone.

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -Which reagent will be used up first if 78.1 g of O₂ is reacted with 62.4 g of C₄H₁₀?

K₄Fe(CNO)₆ has more atoms per molecule than Al(C₃H₅O₂)₃.

The number of molecules of a certain mass of any compound is always higher than the number of moles of the same compound.

One mole of methane has the same mass as half a mole of oxygen.

26 g of aluminum have the same number of atoms as 26g of iron.

The number of atoms in one molecule of (NH₄)₂Cr₂O₇ is 17.

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -The reaction was performed in the lab and 50.1 g of CO₂ was actually collected. How many grams of the excess reactant are left over?

One mole of oxygen gas has fewer atoms than one mole of ozone gas.

One mole of carbon monoxide has the same mass as one mole of nitrogen gas.

(NH₄)₄Fe(CNO)₆ has 36 atoms per formula unit.

One molecule of oxygen gas has fewer molecules than one mole of ozone gas.

K₄Fe(CN)₆ and Al₂(SO₄)₃ have the same number of molecules per atom.

Which has more ions- 2.0 moles of Al₂(SO₄) ₃or 3.0 moles of Na₃PO₄?

What is the mass % of Sn in tin (IV) oxide?

Quiz 9: Stoichiometry and the Mole

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O -The reaction was performed in the lab and 50.1 g of CO2 was actually collected. The percent yield of this reaction is ________.

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O -How many grams of CO2 can be made from reacting 78.1 g of O2 and 62.4 g of C4H10?

The number of atoms of a certain mass of any compound may be lower than the number of molecules of the same compound.

What is the percent yield for a given process, if 4.0 kg of a product is recovered from a reaction whose theoretical yield is 5.6 kg?

18 g of water have the same number of atoms as 48 g of ozone.

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O -Which reagent will be used up first if 78.1 g of O2 is reacted with 62.4 g of C4H10?

K4Fe(CNO)6 has more atoms per molecule than Al(C3H5O2)3.

The number of molecules of a certain mass of any compound is always higher than the number of moles of the same compound.

One mole of methane has the same mass as half a mole of oxygen.

26 g of aluminum have the same number of atoms as 26g of iron.

The number of atoms in one molecule of (NH4)2Cr2O7 is 17.

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O -The reaction was performed in the lab and 50.1 g of CO2 was actually collected. How many grams of the excess reactant are left over?

One mole of oxygen gas has fewer atoms than one mole of ozone gas.

One mole of carbon monoxide has the same mass as one mole of nitrogen gas.

(NH4)4Fe(CNO)6 has 36 atoms per formula unit.

One molecule of oxygen gas has fewer molecules than one mole of ozone gas.

K4Fe(CN)6 and Al2(SO4)3 have the same number of molecules per atom.

Which has more ions- 2.0 moles of Al2(SO4) 3 or 3.0 moles of Na3PO4?

What is the mass % of Sn in tin (IV) oxide?

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -The reaction was performed in the lab and 50.1 g of CO₂ was actually collected. The percent yield of this reaction is ________.

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -How many grams of CO₂ can be made from reacting 78.1 g of O₂ and 62.4 g of C₄H₁₀?

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -Which reagent will be used up first if 78.1 g of O₂ is reacted with 62.4 g of C₄H₁₀?

K₄Fe(CNO)₆ has more atoms per molecule than Al(C₃H₅O₂)₃.

The number of atoms in one molecule of (NH₄)₂Cr₂O₇ is 17.

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O -The reaction was performed in the lab and 50.1 g of CO₂ was actually collected. How many grams of the excess reactant are left over?

(NH₄)₄Fe(CNO)₆ has 36 atoms per formula unit.

K₄Fe(CN)₆ and Al₂(SO₄)₃ have the same number of molecules per atom.

Which has more ions- 2.0 moles of Al₂(SO₄) ₃or 3.0 moles of Na₃PO₄?