Question

calculate the formula unit of mass of 2nO K2CO given atomic masses of Zn=65u Na=23u K=39u C=12u and O=16u​

Answer 1

Answer:

Formula unit mass is defined as the sum of the atomic masses of all atoms that are present in a formula unit of the given compound.

Atomic mass of Zn = 65u

Atomic mass of Na = 23u

Atomic mass of K = 39u

Atomic mass of C = 12u

Atomic mass of O = 16u

Calculating the formula unit masses of the given compounds:

ZnO = (65+16)u = 81u

Na2O = [(2 x 23)+16]u = (46+16)u = 62u

K2CO3 = [(2 x 39)+12+(3×16)] = (78+12+48)u = 138u

Hence, the formula unit mass of ZnO is 81u, Na2O is 62u and K2CO3 is 138u

Answer 2

Answer:

= 138u

Explanation:

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