Question

part b
49.858 g s
express your answers using four significant figures
n =
atoms

Explanation:

Step1: Calculate moles of S

Molar mass of S is 32.065 g/mol. Moles ($n$) = mass / molar mass. So, $n = \frac{49.858\ g}{32.065\ g/mol} \approx 1.5549\ mol$.

Step2: Calculate number of atoms

Using Avogadro's number ($N_A = 6.022\times10^{23}\ atoms/mol$), number of atoms ($N$) = $n\times N_A$. So, $N = 1.5549\ mol\times6.022\times10^{23}\ atoms/mol \approx 9.364\times10^{23}\ atoms$.

Answer:

$9.364\times10^{23}$ atoms