Question

10. How many moles are in 9.03 x 10^31 molecules of Ca? *

Answer 1

Answer:

$150,000,000\text{ moles}$

Explanation:

Here, we want to get the number of moles in the given number of molecules

Mathematically:

$1\text{ mole has 6.02 }\times\text{ 10}^{23}\text{ molecules}$

The number of moles in the given number of molecules is thus:

$\begin{gathered} \frac{9.03\times10^{31}\text{ molecules}}{1}\times\frac{1\text{ mole}}{6.02\text{ }\times\text{ 10}^{23}\text{ molecules}} \\ \\ =\text{ 150,000,000 moles} \end{gathered}$