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JAMB UTME

2H2(g) + O2(g) → 2H2O(g)
In the reaction above, what volume of hydrogen would be left over when 300cm3 of oxygen and 1000 cm3 of hydrogen are exploded in a sealed tube?

A.
200cm3
B.
400cm3
C.
600cm3
D.
700cm3

Answer: B

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