Question

Atoms and molecules
Q1. Calculate the mass of-
i)2 mole of oxygen atoms.
ii) 3 moles of water

Q2. Convert 22 grams of carbon dioxide into mole and also calculate the the number of molecule present in it.
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Answer 1

Answer:

1.ans-The mass of 1 mole of oxygen atoms = 16 g

Thus, the mass of 0.2 mole of oxygen atoms = 16 × 0.2 = 3.2 g

The mass of 1 mole of water molecules = 18 g

Thus, the mass of 0.5 mole of water molecules = 18 × 0.5 = 9.0 g