A 0.6gm sample consisting of only CaC(2)...

A 0.6gm sample consisting of only `CaC_(2)O_(4)` and `MgC_(2)O_(4)` is heated at `500^(@)C`gets converted into `CaCO_(3)` and `MgCO_(3)`. The sample then weighed 0.465gm. If the sample had been heated to `900^(@)C` where the products are CaO and MgO, then what would the mixture of oxides weigh?

0.12 g

0.21 g

0.252 g

0.3 g

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