Question

Calculate the number of grams in magnesium present in 25 g of magnesium phosphate

Answer 1

25 g of Mg3(PO4)2 is about 0.096 mol so each mol of that is equal to 3 mols of Mg
which leads to about 6.9 g of Mg
Mg : 24 g/mol
P : 30 g/mol
O : 16 g/mol

Answer 2

you can google it and it pops up right away