A. 122
B. 101
C. 53
D. 40
Correct Answer:
Option D – 40
Explanation
One of the mole of M(HCO3)2 = 162g; M +(1 + 12 + 16 x 3) x 2 = 162; M +122 = 162,:. M = 162 – 122 = 40g
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