The Mole Concept - Part II

Molar Mass

100

Calculate the molar mass of Osmium.

190.23 g/mol

200

Calculate the molar mass of Br₂

159.808 g/mol

300

Calculate the molar mass of MgCl₂

95.211 g/mol

400

Calculate the molar mass of H₂SO₄

98.078 g/mol

Percent Composition

100

Calculate the percent composition of Hydrogen in H₂O

11.2% H

200

Calculate the percent composition of Oxygen in H₂O

88.8% O

300

Calculate the percent composition of Sodium in Na₂CO₃

43.4% Na

400

Calculate the percent composition of Oxygen in Na₂CO₃

45.3% O

Mole & Mass Conversion

100

1-Step Conversion:

467 g Au = _________ moles Au 

2.37 moles Au

200

1-Step Conversion: 

7.68 moles NaCl = ____________ grams NaCl

449 g NaCl

300

2-Step Conversion:

476 g Au = ____________ atoms Au

1.43 x 10²⁴ atoms of Au

400

2-Step Conversion:

7.68 molecules NaCl = _______ g NaCl

73.3 g NaCl