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

Chemistry
WAEC 1999
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]
  • A. 122
  • B. 101
  • C. 53
  • D. 40
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Correct Answer: Option D
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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