Percentage composition of an organic com...

Percentage composition of an organic compound was `C=40%, H=6.67% `and `O=53.33%.` Its vapour density is found to be 2.813 times that of oxygen. Calculate its emprical formula.

`C_3H_6O_3`

`C_2H_4O_3`

`C_4H_7O_2`

`CH_2O`

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