2.0 g of a sample contains mixture of \[Si{{O}_{2}}\]and\[F{{e}_{2}}{{O}_{\text{3}}}\]. On very strong heating, it leaves a residue weighing 1.96 g. The reaction responsible for loss of mass is given below.\[F{{e}_{2}}{{O}_{3}}(s)\to F{{e}_{3}}{{O}_{4}}(s)+O(g),\](unbalance equation)What is the percentage by mass of \[Si{{O}_{2}}\] in original sample?

2.0 g of a sample contains mixture of \[Si{{O}_{2}}\]and\[F{{e}_{2}}{{

1.	2.0 g of a sample contains mixture of \[Si{{O}_{2}}\]and\[F{{e}_{2}}{{O}_{\text{3}}}\]. On very strong heating, it leaves a residue weighing 1.96 g. The reaction responsible for loss of mass is given below.\[F{{e}_{2}}{{O}_{3}}(s)\to F{{e}_{3}}{{O}_{4}}(s)+O(g),\](unbalance equation)What is the percentage by mass of \[Si{{O}_{2}}\] in original sample?
A.	100%
B.	0.2
C.	0.4
D.	0.6
Answer» D. 0.6

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