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29 June, 09:49

A chemist pumps hydrogen gas (h2) from a tank into a reaction vessel containing 0.734 mol o2. the gases react to form water. if all of the available o2 reacts, how many moles of h2 are used?

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  1. 29 June, 10:06
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    Hydrogen + oxygen - > water

    2H2 + O2 - > 2H2O (balanced)

    2 moles of hydrogen gas will react with 1 mole of oxygen to produce 2 moles of water.

    following that ratio, 0.734 mole of oxygen must need 0.734 * 2 moles of hydrogen to fully react.

    answer is 1.468 moles of hydrogen.
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