One mole of a compound M(HCO3)2 has a mass of 162g. Calculate the relative atomic...

One mole of a compound M(HCO₃)₂ has a mass of 162g. Calculate the relative atomic mass of M. [H = 1, C =12, O = 16]

The correct answer is: D

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