Question 1

How many moles are there in 3.00 g of ethanol,CH3CH2OH?

Accepted Answer

A) 0.00725 mol 
B) 0.0652 mol 
C) 15.3 mol 
D) 138 mol 
A) 0.00725 mol 
B) 0.0652 mol 
C) 15.3 mol 
D) 138 mol

Question 2

The chemical formula for calcium nitride is

Accepted Answer

A) Ca(NO3)2. 
B) Ca(NO2)2. 
C) Ca3N2. 
D) CaN2. 
A) Ca(NO3)2. 
B) Ca(NO2)2. 
C) Ca3N2. 
D) CaN2.

Question 3

Which of the compounds C4H10,BaCl2,Ni(NO3)2,SF6 are expected to exist as molecular compounds?

Accepted Answer

A) only C4H10 
B) C4H10 and SF6 
C) C4H10,Ni(NO3)2,and SF6 
D) BaCl2 and Ni(NO3)2 
A) only C4H10 
B) C4H10 and SF6 
C) C4H10,Ni(NO3)2,and SF6 
D) BaCl2 and Ni(NO3)2

Question 4

The chemical formula for the sulfite ion is

Accepted Answer

A) S-. 
B) S 2-. 
C) SO32-. 
D) SO42-. 
A) S-. 
B) S 2-. 
C) SO32-. 
D) SO42-.

Question 5

How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

Accepted Answer

A) 9.83 × 1020 C2H4 molecules 
B) 7.74 × 1026 C2H4 molecules 
C) 2.71 × 1020 C2H4 molecules 
D) 3.69 × 1023 C2H4 molecules 
E) 4.69 × 1023 C2H4 molecules 
A) 9.83 × 1020 C2H4 molecules 
B) 7.74 × 1026 C2H4 molecules 
C) 2.71 × 1020 C2H4 molecules 
D) 3.69 × 1023 C2H4 molecules 
E) 4.69 × 1023 C2H4 molecules

Question 6

Calculate the molar mass of Ca3(PO4)2.

Accepted Answer

A) 87.05 g/mol 
B) 215.21 g/mol 
C) 310.18 g/mol 
D) 279.21 g/mol 
E) 246.18 g/mol 
A) 87.05 g/mol 
B) 215.21 g/mol 
C) 310.18 g/mol 
D) 279.21 g/mol 
E) 246.18 g/mol

Question 7

The compound,ClO,is named

Accepted Answer

A) chlorite. 
B) hypochlorite. 
C) chlorine monoxide. 
D) chlorine (II)oxide. 
A) chlorite. 
B) hypochlorite. 
C) chlorine monoxide. 
D) chlorine (II)oxide.

Question 8

Give the formula for sodium chlorate.

Accepted Answer

A) NaClO 
B) NaClO2 
C) NaClO3 
D) NaClO4 
A) NaClO 
B) NaClO2 
C) NaClO3 
D) NaClO4

Question 9

The mass of a He atom is ________.

Accepted Answer

A) 6.64 × 10-24 g 
B) 4.003 g 
C) 2.40 × 1024 g 
D) 6.64 × 1022 g 
A) 6.64 × 10-24 g 
B) 4.003 g 
C) 2.40 × 1024 g 
D) 6.64 × 1022 g

Question 10

What is the mass of 0.500 mol of dichlorodifluoromethane,CCl2F2?

Accepted Answer

A) 4.14 × 10-3 g 
B) 60.5 g 
C) 121 g 
D) 242 g 
A) 4.14 × 10-3 g 
B) 60.5 g 
C) 121 g 
D) 242 g

Question 11

What is the chemical formula for calcium hydroxide?

Accepted Answer

A) CaH2 
B) CaOH 
C) CaOH2 
D) Ca(OH)2 
A) CaH2 
B) CaOH 
C) CaOH2 
D) Ca(OH)2

Question 12

How many cations are there 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 cations 
A) 3.67 × 1022 cations 
B) 1.10 × 1023 cations 
C) 9.87 × 1024 cations 
D) 2.96 × 1025 cations

Question 13

Determine the name for N2O5.

Accepted Answer

A) dinitrogen pentoxide 
B) nitrogen oxide 
C) nitrogen (IV)oxide 
D) nitrogen (II)oxide 
E) nitrogen tetroxide 
A) dinitrogen pentoxide 
B) nitrogen oxide 
C) nitrogen (IV)oxide 
D) nitrogen (II)oxide 
E) nitrogen tetroxide

Question 14

How many anions are there in 2.50 g of MgBr2?

Accepted Answer

A) 8.18 × 1021 anions 
B) 1.64 × 1022 anions 
C) 4.43 × 1025 anions 
D) 8.87 × 1025 anions 
A) 8.18 × 1021 anions 
B) 1.64 × 1022 anions 
C) 4.43 × 1025 anions 
D) 8.87 × 1025 anions

Question 15

Determine the name for HClO3.

Accepted Answer

A) hydrochloric acid 
B) hydrochlorus acid 
C) chlorate acid 
D) chloric acid 
E) perchloric acid 
A) hydrochloric acid 
B) hydrochlorus acid 
C) chlorate acid 
D) chloric acid 
E) perchloric acid

Question 16

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O.What is the empirical formula for the compound?

Accepted Answer

A) C5H2O 
B) CHO 
C) C3H6O 
D) C3H7O 
E) C6HO3 
A) C5H2O 
B) CHO 
C) C3H6O 
D) C3H7O 
E) C6HO3

Question 17

Vitamin E is a fat soluble vitamin with the formula C29H50O2 and a molar mass of 431 g/ mole.How many carbon atoms are in 30.0 mg?

Accepted Answer

A) 15.0 × 1020 
B) 4.10 × 1020 
C) 12.1 × 1020 
D) 4.20 × 1022 
A) 15.0 × 1020 
B) 4.10 × 1020 
C) 12.1 × 1020 
D) 4.20 × 1022

Question 18

How many moles of N2O3 contain 2.55 × 1024 oxygen atoms?

Accepted Answer

A) 1.41 moles N2O3 
B) 4.23 moles N2O3 
C) 12.7 moles N2O3 
D) 7.87 moles N2O3 
E) 2.82 moles N2O3 
A) 1.41 moles N2O3 
B) 4.23 moles N2O3 
C) 12.7 moles N2O3 
D) 7.87 moles N2O3 
E) 2.82 moles N2O3

Question 19

What is the chemical formula for iron(III)sulfate?

Accepted Answer

A) Fe3S 
B) Fe3SO4 
C) Fe2S3 
D) Fe2(SO4)3 
A) Fe3S 
B) Fe3SO4 
C) Fe2S3 
D) Fe2(SO4)3

Question 20

What is the mass of 9.44 × 1024 molecules of NO2? The molar mass of NO2 is 46.01 g/mol.

Accepted Answer

A) 205 g 
B) 294 g 
C) 721 g 
D) 341 g 
E) 685 g 
A) 205 g 
B) 294 g 
C) 721 g 
D) 341 g 
E) 685 g

How many moles are there in 3.00 g of ethanol,CH₃CH₂OH?

The chemical formula for calcium nitride is

Which of the compounds C₄H₁₀,BaCl₂,Ni(NO₃)₂,SF₆ are expected to exist as molecular compounds?

The chemical formula for the sulfite ion is

How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g/mol.

Calculate the molar mass of Ca₃(PO₄)₂.

The compound,ClO,is named

Give the formula for sodium chlorate.

The mass of a He atom is ________.

What is the mass of 0.500 mol of dichlorodifluoromethane,CCl₂F₂?

What is the chemical formula for calcium hydroxide?

How many cations are there in 10.0 g of sodium phosphate?

Determine the name for N₂O₅.

How many anions are there in 2.50 g of MgBr₂?

Determine the name for HClO₃.

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO₂ and 59.38 mg of H₂O.What is the empirical formula for the compound?

Vitamin E is a fat soluble vitamin with the formula C₂₉H₅₀O₂ and a molar mass of 431 g/ mole.How many carbon atoms are in 30.0 mg?

How many moles of N₂O₃ contain 2.55 × 10²⁴ oxygen atoms?

What is the chemical formula for iron(III)sulfate?

What is the mass of 9.44 × 10²⁴ molecules of NO₂? The molar mass of NO₂ is 46.01 g/mol.

Matter, Measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

Exam 3: Molecules, Compounds and Chemical Equations

How many moles are there in 3.00 g of ethanol,CH3CH2OH?

The chemical formula for calcium nitride is

Which of the compounds C4H10,BaCl2,Ni(NO3)2,SF6 are expected to exist as molecular compounds?

The chemical formula for the sulfite ion is

How many C2H4 molecules are contained in 45.8 mg of C2H4? The molar mass of C2H4 is 28.05 g/mol.

Calculate the molar mass of Ca3(PO4)2.

The compound,ClO,is named

Give the formula for sodium chlorate.

The mass of a He atom is ________.

What is the mass of 0.500 mol of dichlorodifluoromethane,CCl2F2?

What is the chemical formula for calcium hydroxide?

How many cations are there in 10.0 g of sodium phosphate?

Determine the name for N2O5.

How many anions are there in 2.50 g of MgBr2?

Determine the name for HClO3.

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO2 and 59.38 mg of H2O.What is the empirical formula for the compound?

Vitamin E is a fat soluble vitamin with the formula C29H50O2 and a molar mass of 431 g/ mole.How many carbon atoms are in 30.0 mg?

How many moles of N2O3 contain 2.55 × 1024 oxygen atoms?

What is the chemical formula for iron(III)sulfate?

What is the mass of 9.44 × 1024 molecules of NO2? The molar mass of NO2 is 46.01 g/mol.

Matter, Measurement, and Problem Solving

Atoms and Elements

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Filters

How many moles are there in 3.00 g of ethanol,CH₃CH₂OH?

Which of the compounds C₄H₁₀,BaCl₂,Ni(NO₃)₂,SF₆ are expected to exist as molecular compounds?

How many C₂H₄ molecules are contained in 45.8 mg of C₂H₄? The molar mass of C₂H₄ is 28.05 g/mol.

Calculate the molar mass of Ca₃(PO₄)₂.

What is the mass of 0.500 mol of dichlorodifluoromethane,CCl₂F₂?

Determine the name for N₂O₅.

How many anions are there in 2.50 g of MgBr₂?

Determine the name for HClO₃.

Combustion analysis of 63.8 mg of a C,H and O containing compound produced 145.0 mg of CO₂ and 59.38 mg of H₂O.What is the empirical formula for the compound?

Vitamin E is a fat soluble vitamin with the formula C₂₉H₅₀O₂ and a molar mass of 431 g/ mole.How many carbon atoms are in 30.0 mg?

How many moles of N₂O₃ contain 2.55 × 10²⁴ oxygen atoms?

What is the mass of 9.44 × 10²⁴ molecules of NO₂? The molar mass of NO₂ is 46.01 g/mol.