Question

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

Answer 1

ZnO :- 81
Na2O :- 62
K2CO3 :- 138

Answer 2

Answer:

We know that 2 atoms of K are present, so the total mass of the whole molecule will be (2×39)+12+(3×16) = 138u.

So, from above calculation we can say that formula unit mass of ZnOis 81u.

& Formula unit mass of Na2O is 62u and formula unit mass of K2CO3is 138u.

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