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Calculate the formula unit masses of ZnO, Na_2O, K_2CO_3, give... - Science
Question
Calculate the formula unit masses of ZnO, Na_2O, K_2CO_3, given atomic masses of Zn = 65\ u, Na = 23\ u, K = 39\ u, C = 12\ u, and O = 16\ u.
Answer
Mass of ZnO:
= 65 + 16 = \mathbf{81\ u}Mass of
\text{Na}_2\text{O}:= (2 \times 23) + 16 = 46 + 16 = \mathbf{62\ u}Mass of
\text{K}_2\text{CO}_3:= (2 \times 39) + 12 + (3 \times 16)= 78 + 12 + 48 = \mathbf{138\ u}