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If 30 ml of H2 and 20 ml of O2 react to ...

If 30 ml of `H_2` and 20 ml of `O_2` react to form water, what is left at the end of the reaction ?

A

10 mL of `H_(2)`

B

5 mL of `O_(2)`

C

10 mL of `O_(2)`

D

5 mL of `O_(2)`

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The correct Answer is:
D
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