Question

What is the gram-formula mass of Ca3(PO4)2 ?

Answer 1

Answer:

3) 310 g/mol

Explanation:

Hello,

In this case, for calcium carbonate, we are able to compute its gram-formula mass by considering the atomic mass of each element composing it and their subscripts as shown below:

$M=3*m_{Ca}+2*m_P+4*2*m_O$

Thus, we compute:

$M=3*40g/mol+2*31g/mol+4*2*16g/mol\\\\M=310g/mol$

Hence answer is 3) 310 g/mol . Remember this is also known as the molar mass of the mentioned compound.

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