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How do you work out the volume needed to completely react in this example?

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    If you were told that 2 reactants, e.g. Hydrogen and oxygen, had a molar ratio of 2:1, and hydrogen had a volume of 12dm3, how would you determine the volume of oxygen?
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    Simple.. You would get a spaceship, blast it into space, watch it orbit the earth a bit, collect some cheese particals from the moon before coming back down to earth. The Volume of oxygen would be 1.33* recurring. etc etc. simples.
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    Well, you have 2 parts Hydrogen for 1 part Oxygen

    So you have 12dm3 Hydrogen for xdm3 Oxygen
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    (Original post by nervouspupil123)
    If you were told that 2 reactants, e.g. Hydrogen and oxygen, had a molar ratio of 2:1, and hydrogen had a volume of 12dm3, how would you determine the volume of oxygen?
    first u have to calculate the moles of hydrogen present from the given volume, them divide it by 2 cz the molar ratio is 2:1, so now u have the amount of oxygen in moles. then determine the volume of oxygen present from the moles of oxygen
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    (Original post by aeyurttaser13)
    first u have to calculate the moles of hydrogen present from the given volume, them divide it by 2 cz the molar ratio is 2:1, so now u have the amount of oxygen in moles. then determine the volume of oxygen present from the moles of oxygen
    Why convert volume to moles to convert back to volume?
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    (Original post by ekudamram)
    Why convert volume to moles to convert back to volume?
    i meant for more complex calculations, right now there is no need. i wrote it as a guideline to further questions so the logic behind it is clear
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    so what is the answer? and what would it be for 10cm3 hydrogen and unknown vol. oxygen, with the same (2:1) ratio?
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    (Original post by ekudamram)
    Well, you have 2 parts Hydrogen for 1 part Oxygen

    So you have 12dm3 Hydrogen for xdm3 Oxygen
    what is x :L
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    anyone?
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    12dm3 of a given volume is hydrogen, and so what, multiplied by 2, gives 12?

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