Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor as follows: 4NH3 + 5O2 → 4NO + 6H2O What is the maximum amount of water that may be produced if 40.0 g NH3 and 50.0 g O2 are mixed and allowed to react?

A) 1.56 mol B) 1.88 mol C) 3.52 mol D) 3.91 mol E) 2.35 mol A) 1.56 mol B) 1.88 mol C) 3.52 mol D) 3.91 mol E) 2.35 mol

Calculate the mass in grams of 8.35 × 1022 molecules of CBr4.

A) 0.0217 g B) 0.139 g C) 7.21 g D) 12.7 g E) 46.0 g A) 0.0217 g B) 0.139 g C) 7.21 g D) 12.7 g E) 46.0 g

Methanol (CH3OH) is converted to bromomethane (CH3Br) as follows: CH3OH + HBr → CH3Br + H2O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

A) 12.9% B) 33.8% C) 40.9% D) 59.1% E) 82.6% A) 12.9% B) 33.8% C) 40.9% D) 59.1% E) 82.6%

Calculate the molar mass of Ca(BO2)2·6H2O.

A) 273.87 g/mol B) 233.80 g/mol C) 183.79 g/mol D) 174.89 g/mol E) 143.71 g/mol A) 273.87 g/mol B) 233.80 g/mol C) 183.79 g/mol D) 174.89 g/mol E) 143.71 g/mol

What mass of FeS is formed if 9.42 g of Fe reacts with 68.0 g of S8? 8Fe(s) + S8(s) → 8FeS(s)

A) 186 g B) 142 g C) 119 g D) 14.8 g E) 0.169 g A) 186 g B) 142 g C) 119 g D) 14.8 g E) 0.169 g

Exam 3: Stoichiometry: Ratios of Combination

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Suppose white atoms (W) and black atoms (B) react according to the following balanced chemical equation. 2W + B → BW₂ If the initial reaction mixture is prepared as follows, what will the final reaction mixture be once the reaction is complete?

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Question 121

Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor as follows: 4NH₃ + 5O₂→ 4NO + 6H₂O What is the maximum amount of water that may be produced if 40.0 g NH₃ and 50.0 g O₂ are mixed and allowed to react?

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Question 122

Terephthalic acid, used in the production of polyester fibers and films, is composed of carbon, hydrogen, and oxygen. When 0.6943 g of terephthalic acid was subjected to combustion analysis, it produced 1.471 g CO₂ and 0.226 g H₂O. What is its empirical formula?

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Question 123

How many moles are present in 17.4 g of lead?

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Question 124

What is the coefficient of H₂O when the following equation is properly balanced with the smallest set of whole numbers? Al₄C₃ + H₂O → Al(OH)₃ + CH₄

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Question 125

Calculate the mass in grams of 8.35 × 10²² molecules of CBr₄.

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Question 126

What is the mass percent of oxygen in barium perchlorate?

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Question 127

Methanol (CH₃OH) is converted to bromomethane (CH₃Br) as follows: CH₃OH + HBr → CH₃Br + H₂O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

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Question 128

Calculate the molar mass of Ca(BO₂)₂·6H₂O.

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Question 129

What is the coefficient of H₂O when the following equation is properly balanced with the smallest set of whole numbers? Na + H₂O → NaOH + H₂

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Question 130

Tetraphosphorus hexaoxide is formed by the reaction of phosphorus with oxygen gas. If a mixture of 75.3 g of phosphorus and 38.7 g of oxygen produce 43.3 g of P₄O₆, what is the percent yield for the reaction?

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Question 131

Potassium chloride is used as a substitute for sodium chloride for individuals with high blood pressure. Identify the limiting reactant and determine the mass of the excess reactant remaining when 7.00 g of chlorine gas reacts with 5.00 g of potassium to form potassium chloride.

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Question 132

Which could represent the reaction mixture after the complete combustion of acetaldehyde, CH₃CHO?

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Question 133

________ is defined by the following equation × 100%

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Question 134

How many grams are contained in a 0.893 mol sample of methane, CH₄?

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Question 135

What mass of FeS is formed if 9.42 g of Fe reacts with 68.0 g of S₈? 8Fe(s) + S₈(s) → 8FeS(s)

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Question 136

Aluminum sulfate, Al₂(SO₄)₃, is used in tanning leather, purifying water, and the manufacture of antiperspirants. Calculate its formula mass.

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Question 137

Showing 121 - 137 of 137

Exam 3: Stoichiometry: Ratios of Combination

Suppose white atoms (W) and black atoms (B) react according to the following balanced chemical equation. 2W + B → BW2 If the initial reaction mixture is prepared as follows, what will the final reaction mixture be once the reaction is complete?

Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor as follows: 4NH3 + 5O2 → 4NO + 6H2O What is the maximum amount of water that may be produced if 40.0 g NH3 and 50.0 g O2 are mixed and allowed to react?

Terephthalic acid, used in the production of polyester fibers and films, is composed of carbon, hydrogen, and oxygen. When 0.6943 g of terephthalic acid was subjected to combustion analysis, it produced 1.471 g CO2 and 0.226 g H2O. What is its empirical formula?

How many moles are present in 17.4 g of lead?

What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ________ Al4C3 + ________ H2O → ________ Al(OH)3 + ________ CH4

Calculate the mass in grams of 8.35 × 1022 molecules of CBr4.

What is the mass percent of oxygen in barium perchlorate?

Methanol (CH3OH) is converted to bromomethane (CH3Br) as follows: CH3OH + HBr → CH3Br + H2O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

Calculate the molar mass of Ca(BO2)2·6H2O.

What is the coefficient of H2O when the following equation is properly balanced with the smallest set of whole numbers? ________ Na + ________ H2O → ________ NaOH + ________ H2

Tetraphosphorus hexaoxide is formed by the reaction of phosphorus with oxygen gas. If a mixture of 75.3 g of phosphorus and 38.7 g of oxygen produce 43.3 g of P4O6, what is the percent yield for the reaction?

Potassium chloride is used as a substitute for sodium chloride for individuals with high blood pressure. Identify the limiting reactant and determine the mass of the excess reactant remaining when 7.00 g of chlorine gas reacts with 5.00 g of potassium to form potassium chloride.

Which could represent the reaction mixture after the complete combustion of acetaldehyde, CH3CHO?

________ is defined by the following equation × 100%

How many grams are contained in a 0.893 mol sample of methane, CH4?

What mass of FeS is formed if 9.42 g of Fe reacts with 68.0 g of S8? 8Fe(s) + S8(s) → 8FeS(s)

Aluminum sulfate, Al2(SO4)3, is used in tanning leather, purifying water, and the manufacture of antiperspirants. Calculate its formula mass.

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Suppose white atoms (W) and black atoms (B) react according to the following balanced chemical equation. 2W + B → BW₂ If the initial reaction mixture is prepared as follows, what will the final reaction mixture be once the reaction is complete?

Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor as follows: 4NH₃ + 5O₂→ 4NO + 6H₂O What is the maximum amount of water that may be produced if 40.0 g NH₃ and 50.0 g O₂ are mixed and allowed to react?

Terephthalic acid, used in the production of polyester fibers and films, is composed of carbon, hydrogen, and oxygen. When 0.6943 g of terephthalic acid was subjected to combustion analysis, it produced 1.471 g CO₂ and 0.226 g H₂O. What is its empirical formula?

What is the coefficient of H₂O when the following equation is properly balanced with the smallest set of whole numbers? Al₄C₃ + H₂O → Al(OH)₃ + CH₄

Calculate the mass in grams of 8.35 × 10²² molecules of CBr₄.

Methanol (CH₃OH) is converted to bromomethane (CH₃Br) as follows: CH₃OH + HBr → CH₃Br + H₂O If 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess HBr, what is the percentage yield?

Calculate the molar mass of Ca(BO₂)₂·6H₂O.

What is the coefficient of H₂O when the following equation is properly balanced with the smallest set of whole numbers? Na + H₂O → NaOH + H₂

Tetraphosphorus hexaoxide is formed by the reaction of phosphorus with oxygen gas. If a mixture of 75.3 g of phosphorus and 38.7 g of oxygen produce 43.3 g of P₄O₆, what is the percent yield for the reaction?

Which could represent the reaction mixture after the complete combustion of acetaldehyde, CH₃CHO?

How many grams are contained in a 0.893 mol sample of methane, CH₄?

What mass of FeS is formed if 9.42 g of Fe reacts with 68.0 g of S₈? 8Fe(s) + S₈(s) → 8FeS(s)

Aluminum sulfate, Al₂(SO₄)₃, is used in tanning leather, purifying water, and the manufacture of antiperspirants. Calculate its formula mass.