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Detailed Solution
(1) Density of water 1g/cc 18 ml of H2O = 18g of H2O = NA molecules 1.8 ml of H2O = 1.8g of H2O = NA10 molecules(2) 1 mole = NA molecules 10−4moles - ? NA104molecules(3) 22.4 lit of H2O (g) at STP - NA molecule 2.24x10−4lit of H2O (g) at STP - ? NA105(4) 18g = NA molecules1.8×10−2g = ? NA103