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100mL of each hydrogen and oxygen was mi...

100mL of each hydrogen and oxygen was mixed and fired. What will be the final volume of the mixture when measured at the original conditions?

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The storichiometric equation is given as
`2H_(2)(g)+O_(2)(g)to2H_(2)O(1)`
2vol 1vol 0 vol Gay-Lussac.s coefficients
100mL 100mL 0mL at start
0mL 50mL 0mL after the reaction
The composition of the final mixture is that it has only unreacted oxygen volume =50ml
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