Molar Mass Practice Worksheet

Find the molar masses of the following compounds:

1)         NaBr

            Na       1 (22.989770)

Br        1 (79.904)

= 102.9 g/mol

2)         PbSO₄

Pb       1 (207.2)

S         1 (32.065)

O         4 (15.9994)

= 303.3 g/mol

3)         Ca(OH)₂

Ca       1 (40.078)

            O         2 (15.9994)

            H         2 (1.00794)

                        = 74.1 g/mol

4)         Na₃PO₄

            Na       3 (22.989770)

            P         1 (30.973761)

            O         4 (15.9994)

                        = 163.9 g/mol

5)         (NH₄)₂CO₃

            N         2 (14.0067)

            H         8 (1.00794)

            C         1 (12.0107)

            O         3 (15.9994)

                        = 96.1 g/mol

6)         C₆H₁₂O₆

            C         6 (12.0107)

            H         12 (1.00794)

            O         6 (15.9994)

                        =180.2 g/mol

7)         Fe₃(PO₄)₂

            Fe       3 (55.845)

            P         2 (30.973761)

            O         8 (15.9994)

                        =357.5 g/mol

8)         (NH₄)₂S

            N         2 (14.0067)

            H         8 (1.00794)

            S         1 (32.065)

                        =68.1 g/mol

9)         Zn(C₂H₃O₂)₂

            Zn        1 (65.409)

            C         4 (12.0107)

            H         6 (1.00794)

            O         4 (15.9994)

                        =183.5 g/mol

10)      AgF

            Ag       1 (107.8682)

            F          1 (18.9884032)

                        =126.9 g/mol