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The carbonate of a metal is isomorphous ...

The carbonate of a metal is isomorphous with `MgCO_(3)` and contains 6.091 percentage of carbon. The atomic weight of metal is

A

48

B

`68.5`

C

137

D

120

Text Solution

Verified by Experts

The correct Answer is:
C
Let the formula of the metal carbonate be `MCO _(3),` then percentage of carbon is
`(12)/(x + 60) = ( 6. 0 91)/(100) ` where x = atomic mass of M
`(1200)/(9.091) = x + 60 therefore x = (1200)/(6. 0 91) - 60 = 197. 01 -60 = 137.01`
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