A compound contains 69.5% oxygen and 30.5% nitrogen and its molecular weight is 92. What is the formula of the compound?
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Explanation:
moles of oxygen= 69.5/16
=4.34
moles of nitrogen= 30.5/14
= 2 .18
ratio of moles of nitrogen and oxygen= 2.18 : 4.34
= 1:2
empirical formula= NO2
molecular formula = (NO2)n
where n = molecular mass/ empirical mass
= 92/46
= 2
therefore the formula of the compound is N2O4.
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