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March 27, 2017

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Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water?

  • Chemistry - ,

    2Na + 2H2O ==> 2NaOH + H2
    mols Na = grams/molar mass
    Using the coefficients in the balanced equation, convert mols Na to mols H2.
    Now convert mols H2 to molecules H2. There are 6.02E23 molecules in 1 mol H2. And you have ///// mols H2.

  • Chemistry - ,

    ok thanks for the answer but how do you actually do it?

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