Question #7b3e0

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Truong-Son N.
Oct 30, 2017

Well, how many hydrogen atoms does water have? You have suggested a formula of #"H"_4"O"#.

Water is #"H"_2"O"#, and so its molar mass must be:

#2 xx "1.0079 g/mol" + "15.999 g/mol"#

#=# #ul("18.015 g/mol")#

Note that I used the atomic mass of hydrogen, and there are two hydrogen atoms.

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