Question

question 1
how moles are 3.57e23 atoms of sulfur?
1.687 mol s
5.92e45 mol s
2.15e47 mol s
0.593 mol s

Explanation:

Step1: Recall Avogadro's number

Avogadro's number \(N_A = 6.022\times10^{23}\text{ atoms/mol}\). The formula to convert the number of atoms \(N\) to moles \(n\) is \(n=\frac{N}{N_A}\).

Step2: Substitute the values

Given \(N = 3.57\times 10^{23}\text{ atoms}\) and \(N_A=6.022\times 10^{23}\text{ atoms/mol}\). Then \(n=\frac{3.57\times 10^{23}}{6.022\times 10^{23}}\).
When we divide \(3.57\) by \(6.022\), \(n\approx0.593\text{ mol}\).

Answer:

\(0.593\text{ mol S}\)