Question

Calculate the molecular masses of the following molecules.

MM (g/mol) of PBr3?
MM (g/mol) of WO3?
MM (g/mol) of C7H16?
MM (g/mol) of Ca(H2PO4)2

Answer 1

MM (g/mol) of PBr₃ $= 30.97 +(3\times 79.9) = 270.67$

MM (g/mol) of WO₃ $= 183.85 + (3 \times 15.99) = 231.82$

MM (g/mol) of C₇H₁₆ $= (7 \times 12.01) + (16 \times 1) = 100.07$

MM (g/mol) of Ca(H₂PO₄)₂ $= 40.08 + (2 \times 2 \times 1) + (2 \times 30.97) + (2 \times 4 \times 15.99) = 40.08 + 4 + 61.94 + 127.92 = 233.94$