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25 January, 06:04

After 7.9 grams of sodium are dropped into a bathtub full of water how many grams of hydrogen gas are released

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  1. 25 January, 06:30
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    The grams of hydrogen gas that are released is 0.343 gram

    Explanation:

    Given that:

    2 Na + 2h₂0 ⇒ 2Na0H + N₂

    Molecules of Na = 7.9/2.3 = 0.343 mol Na

    Now,

    2 molecules of Na produces one mole h₂

    0.343 mol of Na produce 0.343/2 = 0.1717 mol h₂

    h2 = molecules * mw (molecular weight) = 0.1717 * 2 = 0.343 grams

    Therefore the grams of hydrogen gas released is = 0.343 grams
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