Two metallic oxides contain 27.6 and 30 oxygen respectively

Asked by admin @ 16/08/2021 in Chemistry viewed by 288 People

Two metallic oxides contain 27.6% and 30% oxygen respectively.If the formula of the first oxide is X3O4,that of the second will be:

1)XO 2)XO2
3)X2O5 4)X2O3

Answered by admin @ 16/08/2021

Given that, formula of first oxide = M3O4
Let mass of the metal = x
% of metal in M3O4 = (3x/ 3x+64) *100
but as given % age = (100-27.6) = 72.4 %
so, (3x/ 3x+64)*100 = 72.4
or x = 56.
in 2nd oxide,
oxygen = 30%....so metal = 70%
so, the ratio is
M : O
70/56 : 30/16
1.25 : 1.875
2 : 3
so, 2nd oxide is M2O3

B-) Hope this helps you

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