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# What is the mass of 2.65 moles of water?

In order to calculate the mass of 2.65 moles of water, the number of moles must be multiplied times the molar mass of water, which is ##"18.015g/mol"##.

##"2.65 mol H"_2"O"## x ##"18.015g"/"1 mol"## = ##"47.7g H"_2"O"##

##"2.65 mol H"_2"O"## has a mass of ##"47.7g"##