Question

3 2. Calculate the formula unit masses of Zno, Na, 0, K,CO, given atomic masses of Zn = 65 u, Na = 23 u, K = 39 u, C = 12 u, and O = 16 u. -​

Answer 1

Answer:

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 = Zn + O

ZnO = (65 + 16)u = 81u

Na2O = 2Na + O

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

Na2O = (46 + 16)u = 62u

K2CO3 = 2K + C + 3O

K2CO3 = [(2 x 39) + 12 + (3×16)]

K2CO3 = (78 + 12 + 48)u = 138u

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

Answer 2

Answer:

Answer:

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 = Zn + O

ZnO = (65 + 16)u = 81u

Na2O = 2Na + O

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

Na2O = (46 + 16)u = 62u

K2CO3 = 2K + C + 3O

K2CO3 = [(2 x 39) + 12 + (3×16)]

K2CO3 = (78 + 12 + 48)u = 138u

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

Explanation:

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