Question

part d
80.732 g sn
express your answers using four significant figures
n =
atoms

Explanation:

Step1: Find molar mass of Sn

The molar mass of Sn (tin) is approximately $118.71\ \text{g/mol}$.

Step2: Calculate moles of Sn

Use the formula $n = \frac{m}{M}$, where $m = 80.732\ \text{g}$ and $M = 118.71\ \text{g/mol}$.
$$n=\frac{80.732\ \text{g}}{118.71\ \text{g/mol}}\approx0.6799\ \text{mol}$$

Step3: Calculate number of atoms

Use Avogadro's number $N_A = 6.022\times 10^{23}\ \text{atoms/mol}$. The number of atoms $N = n\times N_A$.
$$N = 0.6799\ \text{mol}\times6.022\times 10^{23}\ \text{atoms/mol}\approx4.094\times 10^{23}\ \text{atoms}$$

Answer:

$4.094\times 10^{23}$ atoms