Question

determine the number of moles in $5.82 \times 10^{23}$ formula units of $\ce{cacl2}$.

Explanation:

Step1: Recall Avogadro's number

Avogadro's number \( N_A=6.022\times 10^{23}\text{ formula units/mol}\)
The formula to find the number of moles \(n\) is \(n = \frac{\text{Number of formula units}}{N_A}\)

Step2: Substitute the values

Given number of formula units \(=5.82\times 10^{23}\)
\(n=\frac{5.82\times 10^{23}}{6.022\times 10^{23}}\)
\(n=\frac{5.82}{6.022}\approx0.966\)

Answer:

\(0.966\)