Question

What is the molar mass of `Ca_3(PO_4)_2`?

Answer 1

Can you tell me the molar mass of ATOMIC calcium, phosphorus, and oxygen?

Explanation:

In fact you can do this, because you do have access to a Periodic Table, and the atomic masses are printed on the Table. All scientists use the Table daily to assign molecular masses.

And the atomic mass of calcium metal is `40.1*g*mol^-1`, of phosphorus it is `31.00*mol^-1`, of oxygen it is `15.99*g*mol^-1`.

And to determine the molecular mass, all I do is appropriately sum these atomic masses: `(3xx40.1+2xx31.0+8xx16.00)*g*mol^-1`, and what do you get?