1. Molecular & Formula Mass Worksheet - Key
Calculate the molecular mass of each of the following molecular compounds.

2. 4(H) + 2(C) + 2(O)
= 4(1.0) + 2(12.0) + 2(16.0) =
= 60.0 amu

3. 5(C) + 10(H) + 2(N) + 3(O)
= 5(12.0) + 10(1.0) + 2(14.0) + 3(16.0) =
= amu

4. 10(C) + 15(H) + 2(Br) + 3(Cl) = 10(12.0) + 15(1.0) + 2(79.9) + 3(35.5)A
10(C) + 15(H) + 2(Br) + 3(Cl)
= 10(12.0) + 15(1.0) + 2(79.9) + 3(35.5) =
= amu

5. 2(Cu) + (C) + 5(O) + 2(H)
= 2(63.5) + (12.0) + 5(16.0) + 2(1.0) =
= amu

6. 2(Na) + 8(O) + 2(S)
= 2(23.0) + 8(16.0) + 2(32.1) =
= amu

7. 5(H) + (K) + 12(O) + (S) + 2(U)
= 5(1.0) + (39.1) + 12(16.0) + (32.1) + 2(238.0) =
= amu