Question

. Determine the molar mass of Cu base 3(PO base 4)2. (Points : 3)
110.6 g/mol
349.6 g/mol
380.6 g/mol
442.5 g/mol

Answer 1

1 mole Copper (III) Phosphate (Cu3PO4) contains 3 moles of Cu and 1 mole of PO4. The 1 mole of PO4 can be broken into 1 mole of P and 4 moles of O.
So, MM of Cu3PO4 = MM of 3 Cu + MM of 1 P + MM of 4 O

Answer 2

You can find the molar masses of each element on the Periodic Table.

Answer 3

Oh, excuse me, Cu3(PO4)2, there we go lol.
Just multiply the moles of P and O by 2 instead.