Question 1

What is the molar mass of aspartic acid,C4O4H7N?

Accepted Answer

A)  43 g/mol
B)  70 g/mol
C)  133 g/mol
D)  197 g/molE) B) and C)
F) A) and C)

Question 2

Which conducts electricity?

Accepted Answer

A)  A large collection of iron atoms
B)  A single iron atom
C)  Both a large collection of iron atoms and a single iron atom
D)  Neither a large collection of iron atoms nor a single iron atomE) All of the above
F) C) and D)

Question 3

What is the concentration of NO3- ions in a solution prepared by dissolving 15.0 g of Ca(NO3) 2 in enough water to produce 300.mL of solution?

Accepted Answer

A)  0) 152 M
B)  0) 305 M
C)  0) 403 M
D)  0) 609 ME) None of the above
F) All of the above

Question 4

Oxygen can be produced from the catalytic decomposition of KClO3 as shown in the balanced equation below.
2 KClO3 → 2 KCl + 3 O2
What is the percent yield if 3.20 grams of oxygen are formed from the reaction of 12.3 grams of KClO3?

Accepted Answer

Question 5

What is the empirical formula for ethyl fluoride if the compound contains 49.97% carbon,10.51% hydrogen,and 39.52% fluorine by mass?

Accepted Answer

A)  C2H5F
B)  C4H10F2
C)  C4H10F4
D)  C25F2E) All of the above
F) A) and B)

Question 6

In the reaction between glucose and oxygen,10.0 g of glucose reacts and 7.50 L of carbon dioxide is formed.What is the percent yield if the density of CO2 is 1.26 g/L?
C6H12O6(s) + 6 O2(g) → 6 CO2(g) + 6 H2O(l)

Accepted Answer

A)  26.1%
B)  40.6%
C)  43.1%
D)  64.5%E) A) and C)
F) C) and D)

Question 7

How many cations are in 10.0 g of sodium phosphate?

Accepted Answer

A)  3) 67 × 1022 cations
B)  1) 10 × 1023 cations
C)  9) 87 × 1024 cations
D)  2) 96 × 1025 cationsE) None of the above
F) B) and C)

Question 8

Balance the chemical equation given below,and determine the number of moles of iodine that reacts with 10.0 g of aluminum.
_____ Al(s) + _____ I2(s) → _____ Al2I6(s)

Accepted Answer

A)  0) 247 mol
B)  0) 556 mol
C)  0) 741 mol
D)  1) 11 molE) A) and B)
F) All of the above

Question 9

If the percent yield for the following reaction is 75.0%,and 45.0 g of NO2 are consumed in the reaction,how many grams of nitric acid,HNO3(aq) ,are produced?
3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

Accepted Answer

A)  30.8 g
B)  41.1 g
C)  54.8 g
D)  69.3 gE) A) and C)
F) B) and C)

Question 10

How many milliliters of 0.260 M Na2S are needed to react with 40.00 mL of 0.315 M AgNO3?
Na2S(aq) + 2 AgNO3(aq) → 2 NaNO3(aq) + Ag2S(s)

Accepted Answer

A)  24.2 mL
B)  48.5 mL
C)  66.0 mL
D)  96.9 mLE) B) and C)
F) None of the above

Question 11

The following diagram represents the reaction of A2 (unshaded spheres) with B (shaded spheres) .What is the balanced chemical equation for this reaction,and what is the limiting reactant? 2 (unshaded spheres) with B (shaded spheres) .What is the balanced chemical equation for this reaction,and what is the limiting reactant?   A) A2 + 2B → 2AB;A2 is the limiting reactant. B) A2 + 2B → 2AB;B is the limiting reactant. C) 4A2 + 6B → 6AB;A2 is the limiting reactant. D) 4A2 + 6B → 6AB;B is the limiting reactant." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  A2 + 2B → 2AB;A2 is the limiting reactant.
B)  A2 + 2B → 2AB;B is the limiting reactant.
C)  4A2 + 6B → 6AB;A2 is the limiting reactant.
D)  4A2 + 6B → 6AB;B is the limiting reactant.E) C) and D)
F) A) and D)

Question 12

How many milliliters of 0.550 M hydriodic acid are needed to react with 15.00 mL of 0.217 M CsOH?
HI(aq) + CsOH(aq) → CsI(aq) + H2O(l)

Accepted Answer

A)  0) 0263 mL
B)  0) 169 mL
C)  5) 92 mL
D)  38.0 mLE) A) and B)
F) A) and C)

Question 13

How many grams of CaCl2 are formed when 15.00 mL of 0.00237 M Ca(OH) 2 reacts with excess Cl2 gas?
2 Ca(OH) 2(aq) + 2 Cl2(g) → Ca(OCl) 2(aq) + CaCl2(s) + 2 H2O(l)

Accepted Answer

A)  0) 00 197 g
B)  0) 00 394 g
C)  0) 0 0789 g
D)  0) 0 507 gE) A) and C)
F) A) and B)

Question 14

Assume that the unshaded spheres in the buret represent H+ ions,the shaded spheres in the flask represent OH- ions,and you are carrying out a titration of the base with the acid. + ions,the shaded spheres in the flask represent OH- ions,and you are carrying out a titration of the base with the acid.   -If the volumes in the buret and the flask are identical and the concentration of the acid in the buret is 0.250 M,what is the concentration of the base in the flask? A) 0) 167 M B) 0) 250 M C) 0) 375 M D) 0) 667 M" class="answers-bank-image d-inline" rel="preload" >
-If the volumes in the buret and the flask are identical and the concentration of the acid in the buret is 0.250 M,what is the concentration of the base in the flask?

Accepted Answer

A)  0) 167 M
B)  0) 250 M
C)  0) 375 M
D)  0) 667 ME) A) and C)
F) None of the above

Question 15

What is the sum of the coefficients when the following equation is balanced using the lowest whole-numbered coefficients?
_____ B2O3(s) + _____ HF(l) → _____ BF3(g) + _____ H2O(l)

Accepted Answer

A)  8
B)  11
C)  15
D)  none of theseE) A) and B)
F) B) and C)

Question 16

How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.25 L of a 3.5 M H2SO4 solution?

Accepted Answer

A)  0) 097 mL
B)  0) 64 mL
C)  97 mL
D)  640 mLE) None of the above
F) A) and C)

Question 17

10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is false?
N2(g) + 3 H2(g) → 2 NH3(g)

Accepted Answer

A)  2.8 grams of hydrogen are left over.
B)  Hydrogen is the excess reactant.
C)  Nitrogen is the limiting reactant.
D)  The theoretical yield of ammonia is 15 g.E) A) and B)
F) All of the above

Question 18

Balance the chemical equation given below,and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25°C? The density of nitrogen monoxide at 25°C is 1.23 g/L.
_____ NH3(g) + _____ O2(g) → _____ NO(g) + _____ H2O(l)

Accepted Answer

A)  7) 32 L
B)  11.1 L
C)  11.5 L
D)  18.8 LE) A) and D)
F) None of the above

Question 19

If 100.mL of 0.400 M Na2SO4 is added to 200.mL of 0.600 M NaCl,what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.

Accepted Answer

A)  0) 534 M
B)  0) 667 M
C)  1) 00 M
D)  1) 40 ME) A) and B)
F) All of the above

Question 20

A balanced equation has the same numbers and kinds of ________ on both sides of the reaction arrow.

Accepted Answer

The answer of A balanced equation has the same numbers...

Exam 3: Formulas, equations, and Moles

What is the sum of the coefficients when the following equation is balanced using the lowest whole-numbered coefficients? ___ B₂O₃(s) + _ HF(l) → _ BF₃(g) + ___ H₂O(l)

Correct Answer
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If 100.mL of 0.400 M Na₂SO₄ is added to 200.mL of 0.600 M NaCl,what is the concentration of Na⁺ ions in the final solution? Assume that the volumes are additive.

Correct Answer
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Oxygen can be produced from the catalytic decomposition of KClO₃ as shown in the balanced equation below. 2 KClO₃ → 2 KCl + 3 O₂ What is the percent yield if 3.20 grams of oxygen are formed from the reaction of 12.3 grams of KClO₃?

Correct Answer
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What is the empirical formula for ethyl fluoride if the compound contains 49.97% carbon,10.51% hydrogen,and 39.52% fluorine by mass?

Correct Answer
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A balanced equation has the same numbers and kinds of ________ on both sides of the reaction arrow.

Correct Answer
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In the reaction between glucose and oxygen,10.0 g of glucose reacts and 7.50 L of carbon dioxide is formed.What is the percent yield if the density of CO₂ is 1.26 g/L? C₆H₁₂O₆(s) + 6 O₂(g) → 6 CO₂(g) + 6 H₂O(l)

Correct Answer
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Balance the chemical equation given below,and determine the number of moles of iodine that reacts with 10.0 g of aluminum. ___ Al(s) + _ I₂(s) → ___ Al₂I₆(s)

Correct Answer
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Balance the chemical equation given below,and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25°C? The density of nitrogen monoxide at 25°C is 1.23 g/L. ___ NH₃(g) + _ O₂(g) → _ NO(g) + ___ H₂O(l)

Correct Answer
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The following diagram represents the reaction of A₂ (unshaded spheres) with B (shaded spheres) .What is the balanced chemical equation for this reaction,and what is the limiting reactant?

Correct Answer
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What is the molar mass of aspartic acid,C₄O₄H₇N?

Correct Answer
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Which conducts electricity?

Correct Answer
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How many milliliters of 0.550 M hydriodic acid are needed to react with 15.00 mL of 0.217 M CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H₂O(l)

Correct Answer
verified

What is the concentration of NO₃^- ions in a solution prepared by dissolving 15.0 g of Ca(NO₃) ₂ in enough water to produce 300.mL of solution?

Correct Answer
verified

How many milliliters of a 9.0 M H₂SO₄ solution are needed to make 0.25 L of a 3.5 M H₂SO₄solution?

Correct Answer
verified

How many milliliters of 0.260 M Na₂S are needed to react with 40.00 mL of 0.315 M AgNO₃? Na₂S(aq) + 2 AgNO₃(aq) → 2 NaNO₃(aq) + Ag₂S(s)

Correct Answer
verified

How many grams of CaCl₂ are formed when 15.00 mL of 0.00237 M Ca(OH) ₂ reacts with excess Cl₂ gas? 2 Ca(OH) ₂(aq) + 2 Cl₂(g) → Ca(OCl) ₂(aq) + CaCl₂(s) + 2 H₂O(l)

Correct Answer
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Correct Answer
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10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is false? N₂(g) + 3 H₂(g) → 2 NH₃(g)

Correct Answer
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If the percent yield for the following reaction is 75.0%,and 45.0 g of NO₂ are consumed in the reaction,how many grams of nitric acid,HNO₃(aq) ,are produced? 3 NO₂(g) + H₂O(l) → 2 HNO₃(aq) + NO(g)

Correct Answer
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How many cations are in 10.0 g of sodium phosphate?

Correct Answer
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Exam 3: Formulas, equations, and Moles

What is the sum of the coefficients when the following equation is balanced using the lowest whole-numbered coefficients? _____ B2O3(s) + _____ HF(l) → _____ BF3(g) + _____ H2O(l)

Correct AnswerverifiedShow Answer

If 100.mL of 0.400 M Na2SO4 is added to 200.mL of 0.600 M NaCl,what is the concentration of Na+ ions in the final solution? Assume that the volumes are additive.

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Oxygen can be produced from the catalytic decomposition of KClO3 as shown in the balanced equation below. 2 KClO3 → 2 KCl + 3 O2 What is the percent yield if 3.20 grams of oxygen are formed from the reaction of 12.3 grams of KClO3?

Correct AnswerverifiedShow Answer

What is the empirical formula for ethyl fluoride if the compound contains 49.97% carbon,10.51% hydrogen,and 39.52% fluorine by mass?

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A balanced equation has the same numbers and kinds of ________ on both sides of the reaction arrow.

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In the reaction between glucose and oxygen,10.0 g of glucose reacts and 7.50 L of carbon dioxide is formed.What is the percent yield if the density of CO2 is 1.26 g/L? C6H12O6(s) + 6 O2(g) → 6 CO2(g) + 6 H2O(l)

Correct AnswerverifiedShow Answer

Balance the chemical equation given below,and determine the number of moles of iodine that reacts with 10.0 g of aluminum. _____ Al(s) + _____ I2(s) → _____ Al2I6(s)

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Balance the chemical equation given below,and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25°C? The density of nitrogen monoxide at 25°C is 1.23 g/L. _____ NH3(g) + _____ O2(g) → _____ NO(g) + _____ H2O(l)

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The following diagram represents the reaction of A2 (unshaded spheres) with B (shaded spheres) .What is the balanced chemical equation for this reaction,and what is the limiting reactant?

Correct AnswerverifiedShow Answer

What is the molar mass of aspartic acid,C4O4H7N?

Correct AnswerverifiedShow Answer

Which conducts electricity?

Correct AnswerverifiedShow Answer

How many milliliters of 0.550 M hydriodic acid are needed to react with 15.00 mL of 0.217 M CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H2O(l)

Correct AnswerverifiedShow Answer

What is the concentration of NO3- ions in a solution prepared by dissolving 15.0 g of Ca(NO3) 2 in enough water to produce 300.mL of solution?

Correct AnswerverifiedShow Answer

How many milliliters of a 9.0 M H2SO4 solution are needed to make 0.25 L of a 3.5 M H2SO4 solution?

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How many milliliters of 0.260 M Na2S are needed to react with 40.00 mL of 0.315 M AgNO3? Na2S(aq) + 2 AgNO3(aq) → 2 NaNO3(aq) + Ag2S(s)

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How many grams of CaCl2 are formed when 15.00 mL of 0.00237 M Ca(OH) 2 reacts with excess Cl2 gas? 2 Ca(OH) 2(aq) + 2 Cl2(g) → Ca(OCl) 2(aq) + CaCl2(s) + 2 H2O(l)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is false? N2(g) + 3 H2(g) → 2 NH3(g)

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If the percent yield for the following reaction is 75.0%,and 45.0 g of NO2 are consumed in the reaction,how many grams of nitric acid,HNO3(aq) ,are produced? 3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)

Correct AnswerverifiedShow Answer

How many cations are in 10.0 g of sodium phosphate?

Correct AnswerverifiedShow Answer

What is the sum of the coefficients when the following equation is balanced using the lowest whole-numbered coefficients? ___ B₂O₃(s) + _ HF(l) → _ BF₃(g) + ___ H₂O(l)

Correct Answer
verified

If 100.mL of 0.400 M Na₂SO₄ is added to 200.mL of 0.600 M NaCl,what is the concentration of Na⁺ ions in the final solution? Assume that the volumes are additive.

Correct Answer
verified

Oxygen can be produced from the catalytic decomposition of KClO₃ as shown in the balanced equation below. 2 KClO₃ → 2 KCl + 3 O₂ What is the percent yield if 3.20 grams of oxygen are formed from the reaction of 12.3 grams of KClO₃?

Correct Answer
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Correct Answer
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Correct Answer
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In the reaction between glucose and oxygen,10.0 g of glucose reacts and 7.50 L of carbon dioxide is formed.What is the percent yield if the density of CO₂ is 1.26 g/L? C₆H₁₂O₆(s) + 6 O₂(g) → 6 CO₂(g) + 6 H₂O(l)

Correct Answer
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Balance the chemical equation given below,and determine the number of moles of iodine that reacts with 10.0 g of aluminum. ___ Al(s) + _ I₂(s) → ___ Al₂I₆(s)

Correct Answer
verified

Balance the chemical equation given below,and calculate the volume of nitrogen monoxide gas produced when 8.00 g of ammonia is reacted with 12.0 g of oxygen at 25°C? The density of nitrogen monoxide at 25°C is 1.23 g/L. ___ NH₃(g) + _ O₂(g) → _ NO(g) + ___ H₂O(l)

Correct Answer
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The following diagram represents the reaction of A₂ (unshaded spheres) with B (shaded spheres) .What is the balanced chemical equation for this reaction,and what is the limiting reactant?

Correct Answer
verified

What is the molar mass of aspartic acid,C₄O₄H₇N?

Correct Answer
verified

Correct Answer
verified

How many milliliters of 0.550 M hydriodic acid are needed to react with 15.00 mL of 0.217 M CsOH? HI(aq) + CsOH(aq) → CsI(aq) + H₂O(l)

Correct Answer
verified

What is the concentration of NO₃^- ions in a solution prepared by dissolving 15.0 g of Ca(NO₃) ₂ in enough water to produce 300.mL of solution?

Correct Answer
verified

How many milliliters of a 9.0 M H₂SO₄ solution are needed to make 0.25 L of a 3.5 M H₂SO₄solution?

Correct Answer
verified

How many milliliters of 0.260 M Na₂S are needed to react with 40.00 mL of 0.315 M AgNO₃? Na₂S(aq) + 2 AgNO₃(aq) → 2 NaNO₃(aq) + Ag₂S(s)

Correct Answer
verified

How many grams of CaCl₂ are formed when 15.00 mL of 0.00237 M Ca(OH) ₂ reacts with excess Cl₂ gas? 2 Ca(OH) ₂(aq) + 2 Cl₂(g) → Ca(OCl) ₂(aq) + CaCl₂(s) + 2 H₂O(l)

Correct Answer
verified

Correct Answer
verified

10 g of nitrogen is reacted with 5.0 g of hydrogen to produce ammonia according to the chemical equation shown below.Which one of the following statements is false? N₂(g) + 3 H₂(g) → 2 NH₃(g)

Correct Answer
verified

If the percent yield for the following reaction is 75.0%,and 45.0 g of NO₂ are consumed in the reaction,how many grams of nitric acid,HNO₃(aq) ,are produced? 3 NO₂(g) + H₂O(l) → 2 HNO₃(aq) + NO(g)

Correct Answer
verified

Correct Answer
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