The correct sequence of deceasing mass of the following is :
(i) `6.022 xx 10^(23)` atoms of oxygen
(ii) `1.0 xx 10^(23)` molecules of `H_(2)S`
(iii) `6.022 xx 10^(23)` molecules of oxygen

Options

A. (i) `gt` (ii) `gt` (iii)
B. (i) `gt` (iii) `gt` (ii)
C. (iii) `gt` (i) `gt` (ii)
D. (ii) `gt` (i) `gt` (iii)

Answer

C

Explanation

(i) `6.022 xx 10^(23)` atoms of oxygen have mass = 16.0 g
(ii) `6.022xx 10^(23)` molecules of `H_(2)S` have mass = 34.0 g
`1.0 xx 10^(23)` molecules of `H_(2)S` have mass
`= (1xx10^(23))/(6.022xx10^(23))xx(34.0g)=5.645g`
(iii) Mass of `6.022xx10^(23)` molecules of oxygen `(O_(2)) = 32 g`.