20mL of a mixture of CO and H(2) were mi...

`20mL` of a mixture of `CO` and `H_(2)` were mixed excess of `O_(2)` and exploded & cooled. There was a volume contraction of 23mL. All volume measurements corresponds to room temperature `(27^(@)C)` and one atmospheric pressure. Determine the volume ratio `(V_(1):V_(2) "of" Co` anf `H_(2)` in the original mixture .

`6.5:13.5`

`5:15`

`9:11`

`7:13`

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