Question

) How many moles are there in 2.00 x 10^19 molecules of calcium phosphate?

Answer 1

`\huge 3.322 * {10}^( - 5) \: \: 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{2.00 * {10}^(19) }{6.02 * {10}^(23) } \\ \\ = 3.322 * {10}^( - 5) \: \: moles`

Hope this helps you