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

3 gm mixture of `SiO_(2)` and `Fe_(2)O_(3)` on very strong heating leaves a residue weighing 2.92gm because of conversion of `Fe_(3)O_(4)` liberating oxygen gas. What is the percentage by mass of `SiO_(2)` in original mixture?

A

0.2

B

0.8

C

0.4

D

0.6

Text Solution

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The correct Answer is:
A
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