Question

how many grams of H2O are present in 0.2 mole of it​

Answer 1

Hey mate ,

Number of moles = Gram atomic mass / Molecular mass

Gram atomic mass = no. of moles * molecular mass

= 0.2* 18

= 3.6 g

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Answer 2

Answer:

1 mole of hydrogen atoms got 1 gram

so 2 moles of them got 2 grams

1 mole of oxygen atoms got 16 grams

therefore, 1 mole of H2O got 18 grams

2 moles of H2O gets 36 grams.