Question

Calculate the molecular mass of calcium phosphate, Ca,(PO4)2. [Atomic masses of Ca = 40, P=31,0 =16]​

Answer 1

Answer:

Explanation:

We know that atomic mass of calcium = 40, phosphorus = 31 and that of oxygen = 16. Therefore, putting the values we get, molar mass of Ca3(PO4)2= 120+62+128 = 310. Therefore, the mass percentage of calcium in calcium phosphate = 120310×100=38.71.

Answer 2

Given: The given compound is $Ca_3(PO_4)_2$.

To find: We have to find its molecular mass.

Solution:

The given compound is $Ca_3(PO_4)_2$.

The atomic mass of Ca is 40.

The atomic mass of P is 31 and the atomic mass of Oxygen is 16.

This compound has three Ca, two P and eight Oxygen atoms.

Thus, its molecular mass will be as follows-

$40 \times 3 + 2 \times 31 + 8 \times 16 \\ = 120 + 62 + 128 \\ = 310$

Thus, the molecular mass of $Ca_3(PO_4)_2$ is 310.