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ICSE Class 10 Answered

0.290g of an organic compound containing C, H and O gave on combustion 0.270g of water and 0.66g of CO2. What is emperical formula of the compound.
Asked by kumargangwarn | 29 Aug, 2020, 01:34: PM
answered-by-expert Expert Answer
Calculate % C, H and O -
percent sign space of space straight C equals open parentheses bevelled 12 over 44 close parentheses space cross times 100 equals 62.07 space percent sign percent sign space of space straight H space equals open parentheses 2 divided by 18 close parentheses cross times 100 equals space 10.34 space percent sign percent sign space of space straight O equals space space 100 minus left parenthesis 10.34 plus 62.07 right parenthesis equals 27.59 Number space of space moles space of space carbon straight C equals 5.1725 comma space space space straight H equals 10.34 comma space space straight O equals 1.72 Divide space number space of space moles space by space least space number space 1.72. space We space will space get space simple space whole space ratio. straight C equals 3.0 comma space straight H equals 6.0 comma space space straight O equals 1 Empirical space formula space is space straight C subscript 3 straight H subscript 6 straight O
 
Answered by Ravi | 30 Aug, 2020, 07:08: PM
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ICSE 10 - Science
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