Question

Calculate the formula unit masses of ZnO , Na2o , K2CO3, given atomic masses of Zn = 65u , Na = 23u, k= 39u, C= 12u and O = 16u..​

Answer 1

Answer:

Explanation:

ZnO=atomic mass of Zn+atomic mass of O

65u+16u=81u

Na2O=(atomic mass of Na*2)+atomic mass of O

23u*2+16u=62u

K2CO3=(atomic mass of K*2)+atomicmass of C+(atomic mass of O*3)

39u*2+12u+16u*3=138u

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.

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.

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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