Chapter 4, Problem 47QP

A sample of ammonia, ${\text{NH}}_{\text{3}}$ , weights 30.0 g. Calculate the following quantities.

$\begin{array}{l}\left(\text{a}\right){\text{ moles of NH}}_{\text{3}}\\ \left(\text{b}\right){\text{ number of NH}}_{\text{3}}\text{ molecules}\\ \left(\text{c}\right)\text{ number of N atoms}\\ \left(\text{d}\right)\text{ moles of H atoms}\end{array}$