Question

How many moles of Ca are in 7.2x10^25 molecules of Ca
(show work)

Answer 1

119.60 moles

Step-by-step explanation:

To find the number of moles in a substance given it's number of entities we use the formula

`n = (N)/(L) \\`

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

`n = \frac{7.2 * {10}^(25) }{6.02 * {10}^(23) } \\ =119.60132...`

We have the final answer as

119.60 moles

Hope this helps you