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Posted by on Tuesday, April 20, 2010 at 11:10am.

What mass, in grams, of sodium hydroxide (NaOH) is produced if 20 grams of sodium metal(Na) reacts with excess water?

  • chemistry - , Tuesday, April 20, 2010 at 11:18am

    1. Write the equation and balance it.
    2. Convert 20 g Na metal to moles. mols = grams/molar mass.
    3. Using the coefficients in the balanced equation, convert moles Na metal to mols NaOH.
    4. Now convert moles NaOH to grams. g = moles x molar mass.

  • chemistry - , Monday, October 6, 2014 at 10:22am

    2Na + S --> Na2S

    20g Na x (1 mole Na)/(23g Na) = 0.87 mol Na

    0.87 mole Na x (1 mol Na2S)/(2 mol Na) x (55.1g Na2S)/(1 mol Na2S)

    =23.97g Na2S

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