Question

The number of atoms in $10$ litres of ammonia is: $[N=14,H=1]$.

Answer 1

$10$L of ${NH}_3$

$1$mol of ${NH}_3$ gas occupies $22.4$L at STP.

$1mol⟶6.022\times {10}^{23}$atoms

$n=\frac{V}{22.4L}⟶$Given volume

$\downarrow$ $\downarrow$

No. Volume at STP

of

moles

$n=\frac{10}{22.4}=0.446$

$n=0.446$moles

$1mol⟶6.022\times {10}^{23}atoms0.446moles⟶6.022\times {10}^{23}\times 0.446atoms⟶2.68\times {10}^{23}atoms$