What is the maximum number of grams of ammonia, NH3, which can be obtained from the reaction of 10.0 g of H2 and 80.0 g of N2? N2 + 3H2 → 2NH3

A) 34.1 g B) 48.6 g C) 56.3 g D) 90.0 g E) 97.3 g A) 34.1 g B) 48.6 g C) 56.3 g D) 90.0 g E) 97.3 g

Hydrochloric acid can be prepared by the following reaction: 2NaCl(s) + H2SO4(aq) → 2HCl(g) + Na2SO4(s) What mass of HCl can be prepared from 2.00 mol H2SO4 and 150. g NaCl?

A) 2.57 g B) 46.8 g C) 93.6g D) 146 g E) 167g A) 2.57 g B) 46.8 g C) 93.6g D) 146 g E) 167g

If 119.3 g of PCl5 are formed from the reaction of 61.3 g Cl2 with excess PCl3, what is the percent yield? PCl3(g) + Cl2(g) → PCl5(g)

A) 94.6% B) 66.3% C) 57.3% D) 51.3% E) 48.6% A) 94.6% B) 66.3% C) 57.3% D) 51.3% E) 48.6%

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 mole of V2O5 with 6.0 mole of calcium based on the following chemical equation? V2O5(s) + 5Ca(l) → 2V(l) + 5CaO(s)

A) 1.0 mol B) 1.6 mol C) 2.0 mol D) 2.4 mol E) 4.0 mol A) 1.0 mol B) 1.6 mol C) 2.0 mol D) 2.4 mol E) 4.0 mol

The first step in the Ostwald process for producing nitric acid is as follows: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g). If the reaction of 15.0 g of ammonia with 15.0 g of oxygen gas yields 8.70 g of nitric oxide, what is the percent yield of this reaction?

A) 29.0% B) 32.9% C) 49.5% D) 61.8% E) 77.3% A) 29.0% B) 32.9% C) 49.5% D) 61.8% E) 77.3%

Aluminum reacts with bromine to form aluminum bromide (used as an acid catalyst in organic synthesis). Al(s) + Br2(l) → Al2Br6(s) [unbalanced] How many moles of Al are needed to form 2.43 mol of Al2Br6?

A) 7.29 mol B) 4.86 mol C) 2.43 mol D) 1.62 mol E) 1.22 mol A) 7.29 mol B) 4.86 mol C) 2.43 mol D) 1.62 mol E) 1.22 mol

Calculate the formula mass of ammonium arsenate, (NH4)3AsO4.

A) 417.80 amu B) 193.05 amu C) 165.02 amu D) 156.96 amu E) 108.96 amu A) 417.80 amu B) 193.05 amu C) 165.02 amu D) 156.96 amu E) 108.96 amu

Exam 3: Stoichiometry: Ratios of Combination

Sulfur trioxide can react with atmospheric water vapor to form sulfuric acid that falls as acid rain. Calculate the mass in grams of 3.65 × 10²⁰ molecules of sulfur trioxide.

(Multiple Choice)

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Question 21

What is the average mass, in grams, of one atom of iron? (N_A = 6.022 × 10²³ mol^-1)

(Multiple Choice)

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Question 22

Ammonia reacts with oxygen to form nitrogen monoxide and water. What is the theoretical yield and the percent yield if 17.25 g of nitrogen monoxide is produced when 21.50 g of ammonia and 26.85 g of oxygen react? (Show all your work)

(Essay)

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Question 23

What is the empirical formula for a 100-g sample containing 87.42 g of nitrogen and 12.58 g of hydrogen?

(Multiple Choice)

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Question 24

What is the maximum number of grams of ammonia, NH₃, which can be obtained from the reaction of 10.0 g of H₂ and 80.0 g of N₂? N₂ + 3H₂→ 2NH₃

(Multiple Choice)

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Question 25

Hydrochloric acid can be prepared by the following reaction: 2NaCl(s) + H₂SO₄(aq) → 2HCl(g) + Na₂SO₄(s) What mass of HCl can be prepared from 2.00 mol H₂SO₄ and 150. g NaCl?

(Multiple Choice)

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Question 26

The density of water is 1.00 g/mL at 4°C. How many water molecules are present in 6.25 mL of water at this temperature? (N_A = 6.022 × 10²³ mol^-1)

(Multiple Choice)

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Question 27

If 119.3 g of PCl₅ are formed from the reaction of 61.3 g Cl₂ with excess PCl₃, what is the percent yield? PCl₃(g) + Cl₂(g) → PCl₅(g)

(Multiple Choice)

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Question 28

What is the percent sodium in sodium carbonate?

(Multiple Choice)

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Question 29

Calculate the formula mass of potassium permanganate, KMnO₄.

(Multiple Choice)

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Question 30

Many compounds can be represented with the same empirical formula.

(True/False)

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Question 31

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 mole of V₂O₅ with 6.0 mole of calcium based on the following chemical equation? V₂O₅(s) + 5Ca(l) → 2V(l) + 5CaO(s)

(Multiple Choice)

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Question 32

How many grams of calcium metal is required to react with 7.75 g water to produce calcium hydroxide and hydrogen gas?

(Multiple Choice)

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Question 33

The molecular formula is a whole number multiple of the empirical formula.

(True/False)

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Question 34

What is the coefficient of O₂ when the following equation is properly balanced with the smallest set of whole numbers? C₂H₄ + O₂→ CO₂ + H₂O

(Multiple Choice)

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Question 35

When octane (C₈H₁₈) is burned in a particular internal combustion engine, the yield of products (carbon dioxide and water) is 93%. What mass of carbon dioxide will be produced in this engine when 15.0 g of octane is burned with 15.0 g of oxygen gas?

(Multiple Choice)

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Question 36

The first step in the Ostwald process for producing nitric acid is as follows: 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g). If the reaction of 15.0 g of ammonia with 15.0 g of oxygen gas yields 8.70 g of nitric oxide, what is the percent yield of this reaction?

(Multiple Choice)

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Question 37

Aluminum reacts with bromine to form aluminum bromide (used as an acid catalyst in organic synthesis). Al(s) + Br₂(l) → Al₂Br₆(s) [unbalanced] How many moles of Al are needed to form 2.43 mol of Al₂Br₆?

(Multiple Choice)

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Question 38

A certain compound of bromine and fluorine is used to make UF₆, which is an important chemical in the processing and reprocessing of nuclear fuel. The compound contains 58.37 mass percent bromine. What is its empirical formula?

(Multiple Choice)

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Question 39

Calculate the formula mass of ammonium arsenate, (NH₄)₃AsO₄.

(Multiple Choice)

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Question 40

Showing 21 - 40 of 137

Exam 3: Stoichiometry: Ratios of Combination

Sulfur trioxide can react with atmospheric water vapor to form sulfuric acid that falls as acid rain. Calculate the mass in grams of 3.65 × 1020 molecules of sulfur trioxide.

What is the average mass, in grams, of one atom of iron? (NA = 6.022 × 1023 mol-1)

Ammonia reacts with oxygen to form nitrogen monoxide and water. What is the theoretical yield and the percent yield if 17.25 g of nitrogen monoxide is produced when 21.50 g of ammonia and 26.85 g of oxygen react? (Show all your work)

What is the empirical formula for a 100-g sample containing 87.42 g of nitrogen and 12.58 g of hydrogen?

What is the maximum number of grams of ammonia, NH3, which can be obtained from the reaction of 10.0 g of H2 and 80.0 g of N2? N2 + 3H2 → 2NH3

Hydrochloric acid can be prepared by the following reaction: 2NaCl(s) + H2SO4(aq) → 2HCl(g) + Na2SO4(s) What mass of HCl can be prepared from 2.00 mol H2SO4 and 150. g NaCl?

The density of water is 1.00 g/mL at 4°C. How many water molecules are present in 6.25 mL of water at this temperature? (NA = 6.022 × 1023 mol-1)

If 119.3 g of PCl5 are formed from the reaction of 61.3 g Cl2 with excess PCl3, what is the percent yield? PCl3(g) + Cl2(g) → PCl5(g)

What is the percent sodium in sodium carbonate?

Calculate the formula mass of potassium permanganate, KMnO4.

Many compounds can be represented with the same empirical formula.

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 mole of V2O5 with 6.0 mole of calcium based on the following chemical equation? V2O5(s) + 5Ca(l) → 2V(l) + 5CaO(s)

How many grams of calcium metal is required to react with 7.75 g water to produce calcium hydroxide and hydrogen gas?

The molecular formula is a whole number multiple of the empirical formula.

What is the coefficient of O2 when the following equation is properly balanced with the smallest set of whole numbers? ________ C2H4 + ________ O2 → ________ CO2 + ________ H2O

When octane (C8H18) is burned in a particular internal combustion engine, the yield of products (carbon dioxide and water) is 93%. What mass of carbon dioxide will be produced in this engine when 15.0 g of octane is burned with 15.0 g of oxygen gas?

The first step in the Ostwald process for producing nitric acid is as follows: 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g). If the reaction of 15.0 g of ammonia with 15.0 g of oxygen gas yields 8.70 g of nitric oxide, what is the percent yield of this reaction?

Aluminum reacts with bromine to form aluminum bromide (used as an acid catalyst in organic synthesis). Al(s) + Br2(l) → Al2Br6(s) [unbalanced] How many moles of Al are needed to form 2.43 mol of Al2Br6?

A certain compound of bromine and fluorine is used to make UF6, which is an important chemical in the processing and reprocessing of nuclear fuel. The compound contains 58.37 mass percent bromine. What is its empirical formula?

Calculate the formula mass of ammonium arsenate, (NH4)3AsO4.

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Sulfur trioxide can react with atmospheric water vapor to form sulfuric acid that falls as acid rain. Calculate the mass in grams of 3.65 × 10²⁰ molecules of sulfur trioxide.

What is the average mass, in grams, of one atom of iron? (N_A = 6.022 × 10²³ mol^-1)

What is the maximum number of grams of ammonia, NH₃, which can be obtained from the reaction of 10.0 g of H₂ and 80.0 g of N₂? N₂ + 3H₂→ 2NH₃

Hydrochloric acid can be prepared by the following reaction: 2NaCl(s) + H₂SO₄(aq) → 2HCl(g) + Na₂SO₄(s) What mass of HCl can be prepared from 2.00 mol H₂SO₄ and 150. g NaCl?

The density of water is 1.00 g/mL at 4°C. How many water molecules are present in 6.25 mL of water at this temperature? (N_A = 6.022 × 10²³ mol^-1)

If 119.3 g of PCl₅ are formed from the reaction of 61.3 g Cl₂ with excess PCl₃, what is the percent yield? PCl₃(g) + Cl₂(g) → PCl₅(g)

Calculate the formula mass of potassium permanganate, KMnO₄.

What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 2.0 mole of V₂O₅ with 6.0 mole of calcium based on the following chemical equation? V₂O₅(s) + 5Ca(l) → 2V(l) + 5CaO(s)

What is the coefficient of O₂ when the following equation is properly balanced with the smallest set of whole numbers? C₂H₄ + O₂→ CO₂ + H₂O

When octane (C₈H₁₈) is burned in a particular internal combustion engine, the yield of products (carbon dioxide and water) is 93%. What mass of carbon dioxide will be produced in this engine when 15.0 g of octane is burned with 15.0 g of oxygen gas?

The first step in the Ostwald process for producing nitric acid is as follows: 4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g). If the reaction of 15.0 g of ammonia with 15.0 g of oxygen gas yields 8.70 g of nitric oxide, what is the percent yield of this reaction?

Aluminum reacts with bromine to form aluminum bromide (used as an acid catalyst in organic synthesis). Al(s) + Br₂(l) → Al₂Br₆(s) [unbalanced] How many moles of Al are needed to form 2.43 mol of Al₂Br₆?

A certain compound of bromine and fluorine is used to make UF₆, which is an important chemical in the processing and reprocessing of nuclear fuel. The compound contains 58.37 mass percent bromine. What is its empirical formula?

Calculate the formula mass of ammonium arsenate, (NH₄)₃AsO₄.