Question

How many moles of CaCl2 does 2.41 x 1024 formula units represent?

Answer 1

Answer on Question #50317 - Chemistry – Other

Question

How many moles of $\mathrm{CaCl}_2$ does $2.41 \times 10^{24}$ formula units represent?

Answer:

The formula unit of $\mathrm{CaCl}_2$ is molecule.

The formula for calculation of number of moles is:

$$n = \frac {N}{N _ {A}}$$

N – Number of molecules, $N = 2.41 \times 10^{24}$ g;

$N_{A}$ – Avogadro constant, $N_{A} = 6.022 \cdot 10^{23} \mathrm{~mol}^{-1}$.

The number of moles of $2.41 \times 10^{24}$ molecules of $\mathrm{CaCl}_2$ is:

$$n = \frac {2.41 \cdot 10^{24}}{6.022 \cdot 10^{23}} = 4.0 \mathrm{~mol}$$

Answer: 4.0 mol

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