Free Printable Percent Composition and Molar Mass

Worksheets

Name

Class

Date

What is the percentage of oxygen in carbon dioxide? (CO2)

27.3%

72.7%

30%

70%

What is the molar mass of water (H2O)?

18.02g/mol

17.01g/mol

16g/mol

1.01g/mol

How many moles of Ca do you have if you have 2 g of Ca?

0.05 mol Ca

80.16 mol Ca

20.01 mol Ca

What is equal to 1 mole? (multiple answers)

molar mass of any compound

$6.02x10^{23}$ Particles

molar mass of any single element

$6.02x10^{23\ }$ atoms or molecules

Find the percent composition of Cu₂S?

%Cu= 67.987 %S= 32.013

%Cu= 79.854 %S= 20.145

%Cu= 35.946 %S= 64.054

100 %

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