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Grade 129 grade science

What is the mass of
(a) 0.2 mole of oxygen atoms?
(b) 0.5 mole of water molecules?

Profile image of Pawan Prajapati
5 Years agoGrade 12
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1 Answer

Profile image of Harshit Singh
5 Years ago
Dear Student


(a) Mole of Oxygen atoms = 0.2 mole
Molar mass of oxygen atoms = 16 g
Mass of oxygen atoms = 16 × 0.2
= 3.2 g
(b) Mole of water molecule = 0.5 mole
Molar mass of water molecules = 2 × 1 + 16 = 18 g
Mass of H2O = 18 × 0.5
= 9 g


Thanks