Question

calculate the formula unit mass of zno, Na2o and k2 co3 ( Atomic mass of zn =65u, Na=23u, k=39u, C =12u, o=16u​

Answer 1

Answer:

zno, Na2o और k2 co3 के सूत्र इकाई द्रव्यमान की गणना करें ( zn का परमाणु द्रव्यमान =65u, Na=23u, k=39u, C =12u, o=16u

Explanation:

Answer 2

Explanation:

Given:

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

The formula unit mass of ZnO= Atomic mass of Zn + Atomic mass of O = 65u + 16u = 81u

The formula unit mass of Na2O = 2 x Atomic mass of Na + Atomic mass of O = (2 x 23)u + 16u = 46u + 16u = 62u

The formula unit mass of K2CO3 = 2 x Atomic mass of K + Atomic mass of C + 3 x Atomic mass of O = (2 x 39)u + 12u + (3 x 16)u = 78u + 12u + 48u = 138u