Question

Determine the molecular weight of Ca3(PO4)2.

278.18 g
279.21 g
310.18 g
430.42 g

Answer 1

310.18g

Step-by-step explanation:

The molar mass is 310.18 g/mol. To find the molar mass, you must find the atomic mass of each of the elements in the compound.

Answer 2

The molecular weight of
`Ca_3(PO_4)_2` is 310.18 g/mol.

Step-by-step explanation:

The molecular weight of
`Ca_3(PO_4)_2` :

Atomic mass of calcium = 40.08 g/mol

Atomic mass of phosphorous = 30.97 g/mol

Atomic mass of oxygen = 16.00 g/mol

Number of calcium atom = 3

Number of phosphorus atom =1 × 2

Number of oxygen atom =4 × 2 = 8

Molecular weight of
`Ca_3(PO_4)_2` = M

`M=3* 40.08 g/mol+2* 30.97g/mol+8* 16.00g/mol`

M = 310.18 g/mol