Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li s)+ N2(g)→ 2Li3N(s) In a particular experiment, 3.50 g samples of each reagent are reacted. What is the theoretical yield of lithium nitride?

A) 3.52 g B) 2.93 g C) 17.6 g D) 5.85 g E) 8.7 g A) 3.52 g B) 2.93 g C) 17.6 g D) 5.85 g E) 8.7 g

What is the oxidation number of the sulfur atom in K2SO4 ?

A) -2 B) +2 C) +4 D) +6 A) -2 B) +2 C) +4 D) +6

Based on the balanced chemical equation shown below, determine the mass percent of Fe3+ in a 0.7450 g sample of iron ore if 22.40 mL of a 0.1000 mol L-1 stannous chloride, SnCl2(aq), solution is required to completely react with the Fe3+ present in the ore sample. The chemical equation for the reaction is 2Fe3+(aq)+ Sn2+(aq)→ 2Fe2+(aq)+ Sn4+(aq)

A) 5.365% B) 8.396% C) 16.79% D) 33.58% A) 5.365% B) 8.396% C) 16.79% D) 33.58%

What is the concentration of FeCl3 in a solution prepared by dissolving 20.0 g of FeCl3 in enough water to make 275 mL of solution?

A) 4.48 × 10-4 mol L-1 B) 0.448 mol L-1 C) 2.23 mol L-1 D) 2.23 × 103 mol L-1 A) 4.48 × 10-4 mol L-1 B) 0.448 mol L-1 C) 2.23 mol L-1 D) 2.23 × 103 mol L-1

Exam 4: Chemical Reactions and Stoichiometry

Two samples of potassium iodide are decomposed into their constituent elements. The first sample produced 13.0 g of potassium and 42.3 g of iodine. If the second sample produced 24.4 kg of potassium, how many kilograms of iodine were produced?

(Multiple Choice)

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Question 81

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li s)+ N₂(g)→ 2Li₃N(s) In a particular experiment, 3.50 g samples of each reagent are reacted. What is the theoretical yield of lithium nitride?

(Multiple Choice)

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Question 82

How many moles of LiI are contained in 258.6 mL of a 0.0296 mol L^-1 LiI solution?

(Multiple Choice)

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Question 83

Which of the following compounds is insoluble in water?

(Multiple Choice)

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Question 84

Two samples of calcium fluoride are decomposed into their constituent elements. The first sample produced 0.154 g of calcium and 0.146 g of fluorine. If the second sample produced 294 mg of fluorine, how many grams of calcium were formed?

(Multiple Choice)

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Question 85

What is the oxidation number of the sulfur atom in K₂SO₄?

(Multiple Choice)

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Question 86

Based on the balanced chemical equation shown below, determine the molarity of a solution containing Fe²⁺(aq)if 40.00 mL of the Fe²⁺(aq)solution is required to completely react with 30.00 mL of a 0.250 mol L^-1 potassium bromate, KBrO₃(aq), solution. The chemical equation for the reaction is 6Fe²⁺(aq)+ BrO₃^-(aq)+ 6H⁺(aq)→ 6Fe³⁺(aq)+ Br^-(aq)+ 3H₂O(l)

(Multiple Choice)

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Question 87

What is the concentration of HCl in the final solution when 65 mL of a 12 mol L^-1 HCl solution is diluted with pure water to a total volume of 0.15 L?

(Multiple Choice)

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Question 88

Based on the balanced chemical equation shown below, determine the mass percent of Fe³⁺ in a 0.7450 g sample of iron ore if 22.40 mL of a 0.1000 mol L^-1 stannous chloride, SnCl₂(aq), solution is required to completely react with theFe³⁺ present in the ore sample. The chemical equation for the reaction is 2Fe³⁺(aq)+ Sn²⁺(aq)→ 2Fe²⁺(aq)+ Sn⁴⁺(aq)

(Multiple Choice)

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Question 89

What are the required coefficients to properly balance the following chemical reaction? NO(g)+ H₂O(g)→ NH₃(g)+ O₂(g)

(Multiple Choice)

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Question 90

When dissolved in water, KOH behaves as

(Multiple Choice)

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Question 91

How many grams of calcium chloride are needed to produce 1.50 g of potassium chloride? CaCl₂(aq)+ K₂CO₃(aq)→ 2KCl(aq)+ CaCO₃(aq)

(Multiple Choice)

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Question 92

What precipitate is most likely formed from a solution containing Ba⁺², Na⁺¹, OH^-1, and CO₃^-2.

(Multiple Choice)

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Question 93

Carbonic acid can form water and carbon dioxide upon heating. How much carbon dioxide is formed from 6.20 g of carbonic acid? H₂CO₃ → H₂O + CO₂

(Multiple Choice)

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Question 94

How many grams of oxygen are formed when 6.21 moles of KOH are formed? 4KO(s)+ 2H₂O(l)→ 4KOH(s)+ O₂(g)

(Multiple Choice)

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Question 95

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

(Multiple Choice)

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Question 96

Balance the chemical equation given below, and determine the number of grams of MgO needed to produce 10.0 g of Fe₂O₃. MgO(s)+ Fe(s)→ Fe₂O₃(s)+ Mg(s)

(Multiple Choice)

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Question 97

According to the following reaction, what mass of PbCl₂ can form from 235 mL of a 0.110 mol L^-1 KCl solution? Assume that there is excess Pb(NO₃)₂. 2KCl(aq)+ Pb(NO₃)₂(aq)→ PbCl₂(s)+ 2KNO₃(aq)

(Multiple Choice)

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Question 98

What is the concentration of nitrate ions in a 0.125 mol L^-1 Mg(NO₃)₂ solution?

(Multiple Choice)

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Question 99

What is the concentration of FeCl₃ in a solution prepared by dissolving 20.0 g of FeCl₃ in enough water to make 275 mL of solution?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 230

Exam 4: Chemical Reactions and Stoichiometry

Two samples of potassium iodide are decomposed into their constituent elements. The first sample produced 13.0 g of potassium and 42.3 g of iodine. If the second sample produced 24.4 kg of potassium, how many kilograms of iodine were produced?

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li s)+ N2(g)→ 2Li3N(s) In a particular experiment, 3.50 g samples of each reagent are reacted. What is the theoretical yield of lithium nitride?

How many moles of LiI are contained in 258.6 mL of a 0.0296 mol L-1 LiI solution?

Which of the following compounds is insoluble in water?

Two samples of calcium fluoride are decomposed into their constituent elements. The first sample produced 0.154 g of calcium and 0.146 g of fluorine. If the second sample produced 294 mg of fluorine, how many grams of calcium were formed?

What is the oxidation number of the sulfur atom in K2SO4 ?

What is the concentration of HCl in the final solution when 65 mL of a 12 mol L-1 HCl solution is diluted with pure water to a total volume of 0.15 L?

What are the required coefficients to properly balance the following chemical reaction? NO(g)+ H2O(g)→ NH3(g)+ O2(g)

When dissolved in water, KOH behaves as

How many grams of calcium chloride are needed to produce 1.50 g of potassium chloride? CaCl2(aq)+ K2CO3(aq)→ 2KCl(aq)+ CaCO3(aq)

What precipitate is most likely formed from a solution containing Ba+2, Na+1, OH-1, and CO3-2.

Carbonic acid can form water and carbon dioxide upon heating. How much carbon dioxide is formed from 6.20 g of carbonic acid? H2CO3 → H2O + CO2

How many grams of oxygen are formed when 6.21 moles of KOH are formed? 4KO(s)+ 2H2O(l)→ 4KOH(s)+ O2(g)

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Balance the chemical equation given below, and determine the number of grams of MgO needed to produce 10.0 g of Fe2O3. ________ MgO(s)+ ________ Fe(s)→ ________ Fe2O3(s)+ ________ Mg(s)

According to the following reaction, what mass of PbCl2 can form from 235 mL of a 0.110 mol L-1 KCl solution? Assume that there is excess Pb(NO3)2. 2KCl(aq)+ Pb(NO3)2(aq)→ PbCl2(s)+ 2KNO3(aq)

What is the concentration of nitrate ions in a 0.125 mol L-1 Mg(NO3)2 solution?

What is the concentration of FeCl3 in a solution prepared by dissolving 20.0 g of FeCl3 in enough water to make 275 mL of solution?

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Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li s)+ N₂(g)→ 2Li₃N(s) In a particular experiment, 3.50 g samples of each reagent are reacted. What is the theoretical yield of lithium nitride?

How many moles of LiI are contained in 258.6 mL of a 0.0296 mol L^-1 LiI solution?

What is the oxidation number of the sulfur atom in K₂SO₄?

What is the concentration of HCl in the final solution when 65 mL of a 12 mol L^-1 HCl solution is diluted with pure water to a total volume of 0.15 L?

What are the required coefficients to properly balance the following chemical reaction? NO(g)+ H₂O(g)→ NH₃(g)+ O₂(g)

How many grams of calcium chloride are needed to produce 1.50 g of potassium chloride? CaCl₂(aq)+ K₂CO₃(aq)→ 2KCl(aq)+ CaCO₃(aq)

What precipitate is most likely formed from a solution containing Ba⁺², Na⁺¹, OH^-1, and CO₃^-2.

Carbonic acid can form water and carbon dioxide upon heating. How much carbon dioxide is formed from 6.20 g of carbonic acid? H₂CO₃ → H₂O + CO₂

How many grams of oxygen are formed when 6.21 moles of KOH are formed? 4KO(s)+ 2H₂O(l)→ 4KOH(s)+ O₂(g)

Balance the chemical equation given below, and determine the number of grams of MgO needed to produce 10.0 g of Fe₂O₃. MgO(s)+ Fe(s)→ Fe₂O₃(s)+ Mg(s)

According to the following reaction, what mass of PbCl₂ can form from 235 mL of a 0.110 mol L^-1 KCl solution? Assume that there is excess Pb(NO₃)₂. 2KCl(aq)+ Pb(NO₃)₂(aq)→ PbCl₂(s)+ 2KNO₃(aq)

What is the concentration of nitrate ions in a 0.125 mol L^-1 Mg(NO₃)₂ solution?

What is the concentration of FeCl₃ in a solution prepared by dissolving 20.0 g of FeCl₃ in enough water to make 275 mL of solution?