10 Calculate the mass percent composition of lithium in Li3

10) Calculate the mass percent composition of lithium in Li3 PO4. B) 17.98% A) 30.72 % C) 20.82 % D) 55.27 % E) 26.75 %

Solution

We know that molar mass of Li3PO4 = 115.79 g/mol

Molar mass of Li = 6.941 g/mol

Mass percentage = (3×6.941/115.79)× 100

= 17.98%

Option  B is correct.