Question

148
(d) Ilg
3. Calculate the mass of 0.5 mole of N atom
(a) Sg
(b) 2g
(c) 6g
(d) 7g
11​

Answer 1

Given ,

Number of moles of N2 atom = 0.5 mol

Molecular mass of N2 atom = 14 u

We know that ,

$\sf \pink{ \fbox{ \fbox{Moles = \frac{given \: mass }{molecular \: mass} }}}$

Substitute the values , we obtain

$\sf \hookrightarrow 0.5 = \frac{given \: mass}{14} \\ \\ \sf \hookrightarrow given \: mass = 0.5 \times 14 \\ \\ \sf \hookrightarrow given \: mass = 7.0 \: g$

Hence , the required value is 7 g

Remmember :

Nitrogen exists as diatomic molecule (N2)