I. 1 molecule of 2 O weighs 23 1 32 6.023 10 g x x i.e. 23 5.31 10 g x II. 1 atom of N weighs 23 1 14 6.023 10 g x x i.e. 23 2.3 10 g x III. 10 1 10 x moles of 2 O weighs 10 32 1 10 xx g 10 32 10 x g IV. 10 1 10 x moles of Cu weighs 10 63 1 10 xx g 10 63 10 x g The increasing order of masses:- II I III IV The correct option is (a)
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