Question 1

The number of phosphorus atoms in one molecule of H₃PO₄ is ________.

Accepted Answer

A)  1 
B)  8 
C)  6.02 × 1023 
D)  4.8 × 1023 
A)  1 
B)  8 
C)  6.02 × 1023 
D)  4.8 × 1023

Question 2

The molar mass of a compound XClO₃ is 106.5. The molar mass (rounded to the nearest whole number) of X is ________, which is ________.

Accepted Answer

A)  39; K 
B)  23; Na 
C)  7; Li 
D)  1; H 
A)  39; K 
B)  23; Na 
C)  7; Li 
D)  1; H

Question 3

A certain food contains 60 mg of table salt. This is approximately equal to ________ formula units.

Accepted Answer

A)  6 × 1023 
B)  6 × 1022 
C)  6 × 1020 
D)  6 × 1026 
A)  6 × 1023 
B)  6 × 1022 
C)  6 × 1020 
D)  6 × 1026

Question 4

Match each compound with its corresponding molecular mass.
-Ca3(PO?)2

Accepted Answer

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

Question 5

Acetic acid, C₂H₄O₂, and glucose, C₆H₁₂O6, have the same empirical formula.

Accepted Answer

A) True 
 B)False

Question 6

What is the theoretical yield in grams of BaSO₄, if 0.6200 mol Na₂SO₄ and 0.7000 mol BaCL₂ are mixed?
Na₂SO₄+ BaCl2 → BaSO₄ + 2NaCl

Accepted Answer

0.6200 mol

Question 7

How many grams of ammonia are consumed if 45.0 g of NO are formed in a 100% yield? NH₃ + O₂ → NO + H₂O

Accepted Answer

A)  6.51 g 
B)  13.0 g 
C)  26.0 g 
D)  39.0 g 
A)  6.51 g 
B)  13.0 g 
C)  26.0 g 
D)  39.0 g

Question 8

The number of atoms in one formula unit of (NH₄)2Cr₂O7 is 17.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following compounds has its hydrogen composition equal to 2.4%?

Accepted Answer

A)  C₄H₇Cl 
B)  CH₂CL₂ 
C)  C₂H₃NO₂ 
D)  C₁₀H₂₀ONS 
A)  C₄H₇Cl 
B)  CH₂CL₂ 
C)  C₂H₃NO₂ 
D)  C₁₀H₂₀ONS

Question 10

What is the theoretical mass of water produced from 10 moles of NaHCO₃? NaHCO₃ → Na₂CO₃ + CO₂ + H₂O

Accepted Answer

A)  180 g 
B)  90 g 
C)  45 g 
D)  18 g 
A)  180 g 
B)  90 g 
C)  45 g 
D)  18 g

Question 11

K₄Fe(CNO)6 has more atoms per formula unit than Al(C₃H₅O₂)3.

Accepted Answer

A) True 
 B)False

Question 12

What is the mass in grams of 1.000 mole of a compound whose formula is C₃H₇O₂?

Accepted Answer

A)  29.14 g 
B)  68.22 g 
C)  37.54 g 
D)  75.09 g 
A)  29.14 g 
B)  68.22 g 
C)  37.54 g 
D)  75.09 g

Question 13

Match each compound with its corresponding percent of sulfur.
-Na?S

Accepted Answer

A) 8.7% 
B) 22.6% 
C) 41.1% 
D) 40.6% 
A) 8.7% 
B) 22.6% 
C) 41.1% 
D) 40.6%

Question 14

A sample of oxygen gas that contains Avogadro's number of molecules has a mass of ________.

Accepted Answer

A)  8.0 g 
B)  16.0 g 
C)  32.0 g 
D)  64.0 g 
A)  8.0 g 
B)  16.0 g 
C)  32.0 g 
D)  64.0 g

Question 15

One mole of methane has approximately the same mass as half a mole of oxygen gas.

Accepted Answer

A) True 
 B)False

Question 16

Match each compound with its corresponding percent of oxygen.
-C??H16O?

Accepted Answer

A) 50.0% 
B) 26.1% 
C) 43.8% 
D) 18.6% 
E) 27.6% 
A) 50.0% 
B) 26.1% 
C) 43.8% 
D) 18.6% 
E) 27.6%

Question 17

What is the theoretical mass of carbon dioxide produced from one mole of C₂H₆O? C₂H₆O + O₂ → CO₂ + H₂O

Accepted Answer

A)  6 g 
B)  44 g 
C)  88 g 
D)  176 g 
A)  6 g 
B)  44 g 
C)  88 g 
D)  176 g

Question 18

One mole of oxygen gas has fewer atoms than one mole of ozone gas.

Accepted Answer

A) True 
 B)False

Question 19

One mole of ozone, O₃, has 1.8 x 1024 atoms.

Accepted Answer

A) True 
 B)False

Question 20

The theoretical number of water moles produced from two moles of C₆H14 is ________. C₆H14 + O₂ → CO₂ + H₂O

Accepted Answer

A)  1 
B)  6 
C)  7 
D)  14 
A)  1 
B)  6 
C)  7 
D)  14

The number of phosphorus atoms in one molecule of H₃PO₄ is ________.

The molar mass of a compound XClO₃ is 106.5. The molar mass (rounded to the nearest whole number) of X is , which is .

A certain food contains 60 mg of table salt. This is approximately equal to ________ formula units.

Match each compound with its corresponding molecular mass. -Ca₃(PO?)₂

Acetic acid, C₂H₄O₂, and glucose, C₆H₁₂O₆, have the same empirical formula.

What is the theoretical yield in grams of BaSO₄, if 0.6200 mol Na₂SO₄ and 0.7000 mol BaCL₂ are mixed? Na₂SO₄+ BaCl₂ → BaSO₄ + 2NaCl

How many grams of ammonia are consumed if 45.0 g of NO are formed in a 100% yield? NH₃ + O₂ → NO + H₂O

The number of atoms in one formula unit of (NH₄)2Cr₂O₇ is 17.

Which of the following compounds has its hydrogen composition equal to 2.4%?

What is the theoretical mass of water produced from 10 moles of NaHCO₃? NaHCO₃ → Na₂CO₃ + CO₂ + H₂O

K₄Fe(CNO)₆ has more atoms per formula unit than Al(C₃H₅O₂)₃.

What is the mass in grams of 1.000 mole of a compound whose formula is C₃H₇O₂?

Match each compound with its corresponding percent of sulfur. -Na?S

A sample of oxygen gas that contains Avogadro's number of molecules has a mass of ________.

One mole of methane has approximately the same mass as half a mole of oxygen gas.

Match each compound with its corresponding percent of oxygen. -C??H₁₆O?

What is the theoretical mass of carbon dioxide produced from one mole of C₂H₆O? C₂H₆O + O₂ → CO₂ + H₂O

One mole of oxygen gas has fewer atoms than one mole of ozone gas.

One mole of ozone, O₃, has 1.8 x 10²⁴ atoms.

The theoretical number of water moles produced from two moles of C₆H₁₄ is ________. 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

The number of phosphorus atoms in one molecule of H₃PO₄ is ________.

The molar mass of a compound XClO₃ is 106.5. The molar mass (rounded to the nearest whole number) of X is ________, which is ________.

A certain food contains 60 mg of table salt. This is approximately equal to ________ formula units.

Match each compound with its corresponding molecular mass. -Ca3(PO?)2

Acetic acid, C₂H₄O₂, and glucose, C₆H₁₂O6, have the same empirical formula.

What is the theoretical yield in grams of BaSO₄, if 0.6200 mol Na₂SO₄ and 0.7000 mol BaCL₂ are mixed? Na₂SO₄+ BaCl2 → BaSO₄ + 2NaCl

How many grams of ammonia are consumed if 45.0 g of NO are formed in a 100% yield? NH₃ + O₂ → NO + H₂O

The number of atoms in one formula unit of (NH₄)2Cr₂O7 is 17.

Which of the following compounds has its hydrogen composition equal to 2.4%?

What is the theoretical mass of water produced from 10 moles of NaHCO₃? NaHCO₃ → Na₂CO₃ + CO₂ + H₂O

K₄Fe(CNO)6 has more atoms per formula unit than Al(C₃H₅O₂)3.

What is the mass in grams of 1.000 mole of a compound whose formula is C₃H₇O₂?

Match each compound with its corresponding percent of sulfur. -Na?S

A sample of oxygen gas that contains Avogadro's number of molecules has a mass of ________.

One mole of methane has approximately the same mass as half a mole of oxygen gas.

Match each compound with its corresponding percent of oxygen. -C??H16O?

What is the theoretical mass of carbon dioxide produced from one mole of C₂H₆O? C₂H₆O + O₂ → CO₂ + H₂O

One mole of oxygen gas has fewer atoms than one mole of ozone gas.

One mole of ozone, O₃, has 1.8 x 1024 atoms.

The theoretical number of water moles produced from two moles of C₆H14 is ________. 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 molar mass of a compound XClO₃ is 106.5. The molar mass (rounded to the nearest whole number) of X is , which is .

Match each compound with its corresponding molecular mass. -Ca₃(PO?)₂

Acetic acid, C₂H₄O₂, and glucose, C₆H₁₂O₆, have the same empirical formula.

What is the theoretical yield in grams of BaSO₄, if 0.6200 mol Na₂SO₄ and 0.7000 mol BaCL₂ are mixed? Na₂SO₄+ BaCl₂ → BaSO₄ + 2NaCl

The number of atoms in one formula unit of (NH₄)2Cr₂O₇ is 17.

K₄Fe(CNO)₆ has more atoms per formula unit than Al(C₃H₅O₂)₃.

Match each compound with its corresponding percent of oxygen. -C??H₁₆O?

One mole of ozone, O₃, has 1.8 x 10²⁴ atoms.

The theoretical number of water moles produced from two moles of C₆H₁₄ is ________. C₆H₁₄ + O₂ → CO₂ + H₂O