Calculate the formula unit massesof ZnO, Na₂O, K₂CO₃, given atomic masses of Zn = 65u, Na = 23u, K = 39, C = 12u, and O = 16u.

Academic Chemistry NCERT Class 9

The formula unit mass of-

1. ZnO = mass of Zn + mass of O

= 65 +16

= 81 u.

2. Na₂O = 2(mass of Na) + (mass of O)

= 2(23) + 16

= 46+16

= 62 u.

3. K₂CO₃ = 2(39) +12+3(16)

= 78+12+48

= 138 u.

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Updated on: 10-Oct-2022

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