35 cm3 of hydrogen was sparked with 12 cm3 of oxygen at 110°C and 760mm Hg to produce steam. What percentage of the total volume of gas left after the reaction is hydrogen?
11%
31%
35%
69%
Explanation
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Discussions (8)
Pretty sure the question says how much of the remaining gas is hydrogen, not how much of hydrogen was utilized in percentage.
Goodday Myschool team.
Not to bug you but the explanation to this question is incomplete.(Chemistry 1997.no.1)
They're showing me { EOF}. Is there a way it can be corrected? It has also happened in subsequent times.
THANK YOU VERY MUCH,MY REGARDS.
2H2 + O2-------> 2H2O
2 : 1 2
35cm³ 12cm³ _
24cm³ 12cm³ 24cm³
11cm³ 0cm³ 24cm³
This is the way you can solve it. Bit in the question they didn't ask for residual gas nor gas left.
They said, What percentage of the total volume of gas left after the reaction is hydrogen. See what we are looking at here is hydrogen ( I.e their last statement) and we know percentage is that mentioned ÷ by the total × 100
There hydrogen is 11
Hydrogen + water makes 35
So 11/35×100
1100/35 = 31.43 Option B.
