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1.5 gm mixture of SiO(2) and Fe(2)O(3) o...

1.5 gm mixture of `SiO_(2)` and `Fe_(2)O_(3)` on very strong heating leave a residue weighting 1.46 gm. The reaction responsible for loss of weight is
`Fe_(2)O_(3)(s) to Fe_(3)O_(4)(s) +O_(2)(g)`
What is the percentage by mass of `Fe_(2)O_(2)` in original sample.

A

0.8

B

0.2

C

0.4

D

0.6

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