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2 oxides of a metal contain 27.6% and 30% of oxygen if ihe formula of the 1 st compound is M3O4 find the formula 2 nd compound

2 oxides of a metal contain 27.6% and 30% of oxygen if ihe formula of the 1st compound is M3O4  find the formula 2nd compound

Grade:11

1 Answers

varun
304 Points
6 years ago
HELLO.
givwn that,formula of the first oxide = M3O4
Let the mass of the metal = x
% of the meatl in M3O4 = (3X/3X+64) X 100
BUT as given percentage = (100 – 27.4) = 72.4%
so,(3x/3x+64) X 100 = 72.4
so, x = 56
In second oxide,
oxygen = 30%
so metal = 70%
so ratio = M:O
70/56 : 30/16
1.25      1.875
2            3
so the formula of the oxide = M2O3
THANK YOU
 

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