Question 1

Match each compound with its corresponding percent of nitrogen.
-Ca(CN)2

Accepted Answer

A) 29.2% 
B) 63.6% 
C) 7.7% 
D) 30.4% 
A) 29.2% 
B) 63.6% 
C) 7.7% 
D) 30.4%

Question 2

What is the mass of sulfur that will react with 0.527 g of copper metal to yield copper (I) sulfide?

Accepted Answer

A)  0.066 g 
B)  0.132 g 
C)  0.264 g 
D)  0.198 g 
A)  0.066 g 
B)  0.132 g 
C)  0.264 g 
D)  0.198 g

Question 3

The theoretical yield of water produced from of 2.0 moles of C₃H8O is ________ g. 2 C₃H8O + 9 O₂ → 6 CO₂ + 8 H₂O

Accepted Answer

A)  8 
B)  18 
C)  36 
D)  144 
A)  8 
B)  18 
C)  36 
D)  144

Question 4

Which reactant is present in excess if 10.0 g of CaO react with 3.0 mol of H₂O? CaO + H₂O → Ca(OH)2

Accepted Answer

A)  Ca(OH)2 
B)  CaO 
C)  H₂O 
D)  None of the above, the amounts exactly balance. 
A)  Ca(OH)2 
B)  CaO 
C)  H₂O 
D)  None of the above, the amounts exactly balance.

Question 5

How many grams of NO will form when 40 g of oxygen are used? NH₃ + O₂ → NO + H₂O

Accepted Answer

A)  30 g 
B)  15 g 
C)  45 g 
D)  60 g 
A)  30 g 
B)  15 g 
C)  45 g 
D)  60 g

Question 6

Which is the correct statement about one mole of ammonia, NH₃?

Accepted Answer

A)  It contains 14 g nitrogen and 3 g hydrogen. 
B)  It contains 6.02 × 1023 molecules. 
C)  It contains 1.8 × 1024 atoms of hydrogen. 
D)  all of the above 
A)  It contains 14 g nitrogen and 3 g hydrogen. 
B)  It contains 6.02 × 1023 molecules. 
C)  It contains 1.8 × 1024 atoms of hydrogen. 
D)  all of the above

Question 7

A sample of calcium that contains Avogadro's number of atoms has a mass of ________.

Accepted Answer

A)  20 g 
B)  40 g 
C)  80 g 
D)  160 g 
A)  20 g 
B)  40 g 
C)  80 g 
D)  160 g

Question 8

What is the percent yield if 52 g of ammonia produce 45 g of NO? NH₃ + O₂ → NO + H₂O

Accepted Answer

A)  100% 
B)  49% 
C)  25% 
D)  18% 
A)  100% 
B)  49% 
C)  25% 
D)  18%

Question 9

Combustion of 6.51 mg of a compound produces 20.46 mg of carbon dioxide and 8.36 mg of water. The empirical formula is ________.

Accepted Answer

A)  CH₂O 
B)  C₂H₃ 
C)  C₂H₃O 
D)  CH₂ 
A)  CH₂O 
B)  C₂H₃ 
C)  C₂H₃O 
D)  CH₂

Question 10

The molar mass of a compound X(HCO₃)2 is 146. The atomic weight of X when rounded to the nearest whole number is ________, which is ________.

Accepted Answer

A)  24; Mg 
B)  40; Ca 
C)  51; V 
D)  56; Fe 
A)  24; Mg 
B)  40; Ca 
C)  51; V 
D)  56; Fe

Question 11

The number of oxygen atoms in 1 mole of AL₂(SO₄)3 is ________.

Accepted Answer

A)  3 
B)  4 
C)  12 
D)  none of the above 
A)  3 
B)  4 
C)  12 
D)  none of the above

Question 12

Determine the percent yield of an experiment in which 1 mole of C₂H₆O was consumed and 22 g of carbon dioxide was isolated. C₂H₆O + O₂ → CO₂ + H₂O

Accepted Answer

A)  100% 
B)  50% 
C)  37.5% 
D)  25% 
A)  100% 
B)  50% 
C)  37.5% 
D)  25%

Question 13

The molar mass of a compound Ca(MO₃)2 is 160. The atomic mass of M is ________, which is ________.

Accepted Answer

A)  12; C 
B)  14; N 
C)  32; S 
D)  35; Cl 
A)  12; C 
B)  14; N 
C)  32; S 
D)  35; Cl

Question 14

Match each compound with its corresponding molecular mass.
-C?H8O?

Accepted Answer

A) 342 
B) 310 
C) 88 
D) 122.5 
A) 342 
B) 310 
C) 88 
D) 122.5

Question 15

0.3 moles of a certain calcium compound weigh 93 g. This compound may be ________.

Accepted Answer

A)  calcium nitrate 
B)  calcium chromate 
C)  calcium phosphate 
D)  calcium sulfate 
A)  calcium nitrate 
B)  calcium chromate 
C)  calcium phosphate 
D)  calcium sulfate

Question 16

Which of the following has the highest molar mass?

Accepted Answer

A)  (NH₄)3PO₃ 
B)  Ca3(PO₄)2 
C)  AL₂(SO₃)3 
D)  CO₂(CO₃)2 
A)  (NH₄)3PO₃ 
B)  Ca3(PO₄)2 
C)  AL₂(SO₃)3 
D)  CO₂(CO₃)2

Question 17

64 g of oxygen will yield ________ g of nitrogen dioxide. N₂ + 2 O₂ → 2 NO₂

Accepted Answer

A)  23 
B)  46 
C)  92 
D)  184 
A)  23 
B)  46 
C)  92 
D)  184

Question 18

Which of the following has the least number of atoms?

Accepted Answer

A)  (NH₄)3PO₄ 
B)  Na₂P₂O₃ 
C)  (NH₄)2Cr₂O7 
D)  K₄Fe(CNO)6 
A)  (NH₄)3PO₄ 
B)  Na₂P₂O₃ 
C)  (NH₄)2Cr₂O7 
D)  K₄Fe(CNO)6

Question 19

21.2 g KBr is equal to 0.178 moles of KBr.

Accepted Answer

A) True 
 B)False

Question 20

What is the theoretical mass of carbon dioxide produced from one mole of C₆H14? C₆H14 + O₂ → CO₂ + H₂O

Accepted Answer

A)  6 g 
B)  44 g 
C)  132 g 
D)  264 g 
A)  6 g 
B)  44 g 
C)  132 g 
D)  264 g

Match each compound with its corresponding percent of nitrogen. -Ca(CN)2

What is the mass of sulfur that will react with 0.527 g of copper metal to yield copper (I) sulfide?

The theoretical yield of water produced from of 2.0 moles of C₃H₈O is ________ g. 2 C₃H₈O + 9 O₂ → 6 CO₂ + 8 H₂O

Which reactant is present in excess if 10.0 g of CaO react with 3.0 mol of H₂O? CaO + H₂O → Ca(OH)₂

How many grams of NO will form when 40 g of oxygen are used? NH₃ + O₂ → NO + H₂O

Which is the correct statement about one mole of ammonia, NH₃?

A sample of calcium that contains Avogadro's number of atoms has a mass of ________.

What is the percent yield if 52 g of ammonia produce 45 g of NO? NH₃ + O₂ → NO + H₂O

Combustion of 6.51 mg of a compound produces 20.46 mg of carbon dioxide and 8.36 mg of water. The empirical formula is ________.

The molar mass of a compound X(HCO₃)₂ is 146. The atomic weight of X when rounded to the nearest whole number is , which is .

The number of oxygen atoms in 1 mole of AL₂(SO₄)₃ is ________.

Determine the percent yield of an experiment in which 1 mole of C₂H₆O was consumed and 22 g of carbon dioxide was isolated. C₂H₆O + O₂ → CO₂ + H₂O

The molar mass of a compound Ca(MO₃)₂ is 160. The atomic mass of M is , which is .

Match each compound with its corresponding molecular mass. -C?H₈O?

0.3 moles of a certain calcium compound weigh 93 g. This compound may be ________.

Which of the following has the highest molar mass?

64 g of oxygen will yield ________ g of nitrogen dioxide. N₂ + 2 O₂ → 2 NO₂

Which of the following has the least number of atoms?

21.2 g KBr is equal to 0.178 moles of KBr.

What is the theoretical mass of carbon dioxide produced from one mole of C₆H₁₄? C₆H₁₄ + O₂ → CO₂ + H₂O

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

Exam 9: Stoichiometry and the Mole

Match each compound with its corresponding percent of nitrogen. -Ca(CN)2

What is the mass of sulfur that will react with 0.527 g of copper metal to yield copper (I) sulfide?

The theoretical yield of water produced from of 2.0 moles of C₃H8O is ________ g. 2 C₃H8O + 9 O₂ → 6 CO₂ + 8 H₂O

Which reactant is present in excess if 10.0 g of CaO react with 3.0 mol of H₂O? CaO + H₂O → Ca(OH)2

How many grams of NO will form when 40 g of oxygen are used? NH₃ + O₂ → NO + H₂O

Which is the correct statement about one mole of ammonia, NH₃?

A sample of calcium that contains Avogadro's number of atoms has a mass of ________.

What is the percent yield if 52 g of ammonia produce 45 g of NO? NH₃ + O₂ → NO + H₂O

Combustion of 6.51 mg of a compound produces 20.46 mg of carbon dioxide and 8.36 mg of water. The empirical formula is ________.

The molar mass of a compound X(HCO₃)2 is 146. The atomic weight of X when rounded to the nearest whole number is ________, which is ________.

The number of oxygen atoms in 1 mole of AL₂(SO₄)3 is ________.

Determine the percent yield of an experiment in which 1 mole of C₂H₆O was consumed and 22 g of carbon dioxide was isolated. C₂H₆O + O₂ → CO₂ + H₂O

The molar mass of a compound Ca(MO₃)2 is 160. The atomic mass of M is ________, which is ________.

Match each compound with its corresponding molecular mass. -C?H8O?

0.3 moles of a certain calcium compound weigh 93 g. This compound may be ________.

Which of the following has the highest molar mass?

64 g of oxygen will yield ________ g of nitrogen dioxide. N₂ + 2 O₂ → 2 NO₂

Which of the following has the least number of atoms?

21.2 g KBr is equal to 0.178 moles of KBr.

What is the theoretical mass of carbon dioxide produced from one mole of C₆H14? C₆H14 + O₂ → CO₂ + H₂O

What Is Chemistry

The Numerical Side of Chemistry

The Evolution of Atomic Theory

The Modern Model of the Atom

Chemical Bonding and Nomenclature

The Shape of Molecules

Intermolecular Forces and the Phases of Matter

Chemical Reactions

Electron Transfer in Chemical Reactions

What If There Were No Intermolecular Forces - the Ideal Gas

Solutions

When Reactants Turn Into Products

Chemical Equilibrium

Electrolytes, Acids, and Bases

Nuclear Chemistry

The Chemistry of Carbon

Synthetic and Biological Polymers

Filters

The theoretical yield of water produced from of 2.0 moles of C₃H₈O is ________ g. 2 C₃H₈O + 9 O₂ → 6 CO₂ + 8 H₂O

Which reactant is present in excess if 10.0 g of CaO react with 3.0 mol of H₂O? CaO + H₂O → Ca(OH)₂

The molar mass of a compound X(HCO₃)₂ is 146. The atomic weight of X when rounded to the nearest whole number is , which is .

The number of oxygen atoms in 1 mole of AL₂(SO₄)₃ is ________.

The molar mass of a compound Ca(MO₃)₂ is 160. The atomic mass of M is , which is .

Match each compound with its corresponding molecular mass. -C?H₈O?

What is the theoretical mass of carbon dioxide produced from one mole of C₆H₁₄? C₆H₁₄ + O₂ → CO₂ + H₂O