The molecular mass of water is 18.02 amu. What is the mass of Avogadro’s number of water molecules?

1 Answer
Nathan L.
Jul 9, 2017

#18.02# #"g"#

Explanation:

This question involves a fundamental concept of the mole:

The mass in #"amu"# of one unit of a substance is equivalent to the mass in #"g"# of one mole of that substance

Therefore, if one water molecule has a mass of #18.02# #"amu"#, one mole (#6.022 xx 10^23# #"H"_2"O"# molecules) of water has a mass of #color(red)(18.02# #color(red)("g"#.

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