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 `M

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?
A. 0.12gm
B. 0.21gm
C. 0.252gm
D. 0.3gm

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 t

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