Question

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Answer 1

a) For H2O molecule -Relative mass of hydrogen (H) = 1u.Relative mass of oxygen (O) = 16u.According to the formula of water contains 2 hydrogen atoms,5.So, relative mass of water = 2 *( 1u ) + 16u. = 18u.6.So, Relative mass of water = 18u.

b) molar mass:-63.01 g/mol

Melting point- -42°C

Density- 1.51 g/cm3

Formula- HNO3

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