How much water can be made from 5.41 ×1024 hydrogen molecules?

Written by admin on February 5, 2010 – 9:59 pm -


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How much water can be made from 5.41 ×
1024 hydrogen molecules? Answer in units of
g.

297 g. You would convert the number of H2 molecules to moles by using avogadro’s number. Next, after writing the balanced equation for the formation of water by hydrogen and oxygen, use the coefficients of the hydrogen and water to form a ratio and then convert the moles of water to grams of water.

2H2 + O2 —> 2H2O

5.41E24 molecules H2 * ( 1 mole H2 / 6.022E23 molecules H2)* (2 moles H2O / 2 moles H2) * (33.01 g H2O / 1 mole H2O) = 297 grams H2O


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One Response to “How much water can be made from 5.41 ×1024 hydrogen molecules?”

  1. By Domoneque on Feb 6, 2010 | Reply

    297 g. You would convert the number of H2 molecules to moles by using avogadro’s number. Next, after writing the balanced equation for the formation of water by hydrogen and oxygen, use the coefficients of the hydrogen and water to form a ratio and then convert the moles of water to grams of water.

    2H2 + O2 —> 2H2O

    5.41E24 molecules H2 * ( 1 mole H2 / 6.022E23 molecules H2)* (2 moles H2O / 2 moles H2) * (33.01 g H2O / 1 mole H2O) = 297 grams H2O
    References :

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