Question

Which of the following contains the greatest number of atoms?

• A. 1.0 g of butane $\left(C_4{H}_{10}\right)$
• B. 1.0 g of nitrogen
• C. 1.0 g of silver (Ag)
• D. 1.0 g of water

Answer 1

The correct option is A 1.0 g of butane $\left(C_4{H}_{10}\right)$

$\begin{array}{cccc}\text{Compound}& \text{mole of molecule}& \text{mole of atom}& \text{No. of atom}\\ C_4{H}_{10}& \frac{1}{58}& 14\times \frac{1}{58}& \frac{14}{58}{N}_A\\ N_2& \frac{1}{28}& 2\times \frac{1}{28}& \frac{1}{14}{N}_A\\ Ag& \frac{1}{108}& \frac{1}{108}& \frac{1}{108}{N}_A\\ H_{2}O& \frac{1}{18}& 3\times \frac{1}{18}& \frac{1}{6}{N}_A\end{array}$