Chemistry: Matter and Change

Section 3: Moles of Compounds

Self Check Quizzes

1
What is the mass of 5.0 x 1021 molecules of water?
A)8.3 x 10-3 g
B)0.15 g
C)5.0 g
D)6.02 x 1023 g
2
What is the mass of 1.0 x 1012 molecules of O2?
A)1.9 x 1013 g
B)6.0 x 1011 g
C)2.7 x 10-11 g
D)5.3 x 10-11 g
3
How many moles of hydrogen atoms are present in 2.0 moles of ammonia NH3?
A)3.0 mol
B)6.0 mol
C)8.0 mol
D)2.0 mol
4
What is the molar mass of H2CrO4?
A)118 g
B)52 g
C)64 g
D)2 g
5
Acetic acid has the molecular formula CH3COOH. How many atoms of oxygen in 60 grams of acetic acid.

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A)6.0 x 1023 atoms of oxygen
B)1.0 x 1022 atoms of oxygen
C)3.6 x1025 atoms of oxygen
D)1.2 x 1024 atoms of oxygen
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