Question

How many moles are in 7.00E24 atoms of Ca?

Answer 1

Step-by-step explanation:

In chemistry, a mole is the base unit of the amount of substance in a system containing elementary entities (atoms, molecules, ions, electrons), and one mole of substance corresponds to the Avogadro's constant or
`6.023 \ * \ 10^(23)` entities. The stoichiometry equation that relates the amount of substance into the measurement in moles is

`n \ = \ \displaystyle(\alpha)/(N_(A))`,

where
`n` is the number of moles,
`\alpha` is the amount of substance and
`N_(A)` is the Avogadro's constant.

Therefore,

`n \ = \ \displaystyle\frac{7.00 \ * \ 10^(24) \ \text{atoms}}{6.023 \ * \ 10^(23) \ \text{atoms mol}^(-1)} \\ \\ n \ = \ 11.624 \ \text{mol}`.