Which of the following is the lightest (a) 0.2 mole of hydrogen gas (b) 6.023 x 10^22 ,olecules of nitrogen (c) 1.0 g of silver (d) 0.1 mole of oxygen gas (e) 1 g of water olecules of nitrogen (c) 1.0 g of silver (d) 0.1 mole of oxygen gas (e) 1 g of water [...]