Question

How many grams are in 9.30 x 10-2 moles of calcium phosphate, Caz(PO3)2?

a. 25.9 g b. 17.65 g
c. 0.064 g
d. 259 g

Answer 1

25.9 g

Step-by-step explanation:

Given that,

No of moles of calcium phosphate,
`n=9.3* 10^(-2)`

We need to find how many grams of calcium phosphate has this much of no of moles.

Mass divided by molar mass is equal to the no of moles on a molecule.

The molar mass of calcium phosphate is 310.18 g/mol

Using the concept of no of moles as follows :

`n=(m)/(M)\\\\m=n* M\\\\m=9.3* 10^(-2)* 310.18\\\\m=28.84\ g`

Out of given options, option (a) i.e. 25.9 g is the correct answer.