Calculate number of atoms in each of the following"
i. 0.5 mol atom of nitorgen
ii. 0.2 mol molecules of hydrogen
iii. 3.2 g of sulphur
Calculate number of molecules in each of the following:
i. 14 g of nitrogen
ii. 3.4 g of `H_(2) S`

Explanation

1 mol of `N_(2) = 6.023 xx 10^(23)` molecules or mole atom
`0.5 " mol atom of" N_(2) = 6.023 xx 10^(23) xx 0.5`
`3.10 xx 10^(23)` atoms
ii. 1 mol of `H_(2) = 6.023 xx 10^(23)` molecules
`= 2 xx 6.023 xx 10^(23)` atoms
`0.2 mol of H_(2) = 2 xx 6.023 xx 10^(23)` atoms
iii. `32 g of S = 6.023 xx 10^(23)` atoms
`3.2 g of S = 6.023 xx 10^(22)` atoms
b. `1 mol of N_(2) = 28 g`
i. `28 g of N_(2) = 6.023 xx 10^(23)` molecules
`14 g of N_(2) = (6.023 xx 10^(23))/(28) xx 14`
`= 3.01 xx 10^(23)` molecules ltbRgt ii. `34 g of H_(2) S implies 6.023 xx 10^(23)` molecules
`3.4 g of H_(2) Simplies 6.023 xx 10^(22)` molecules