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Chiomatn93

  • 3 years ago

What is the mass (in grams) of one molecule of H2O? Express your answer using scientific notation with two decimal places.

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  1. completeidiot
    • 3 years ago
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    do you know avagadro's number?

  2. Chiomatn93
    • 3 years ago
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    yes

  3. completeidiot
    • 3 years ago
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    ok do you know the mass number of H2O? if we have a mole of molecules, the total mass is the value of the mass numbers in grams ex. a mole of helium atoms would be 4g so if we wanted to determine the mass of a single helium atom in grams, we could just divide 4g by avagadro's number

  4. completeidiot
    • 3 years ago
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    mol of O- 16g mol of 2H- 2g mol of H20- 18g

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