What is the mass of #2.14 * 10^10# molecules of water?

1 Answer
Mar 12, 2016

Answer:

#~~6.39xx10^-13g#

Explanation:

molar mass of water = #18gmol^-1#
So #6.022xx10^23#molecules have mass 18g
mass of #2.14xx10^10# molecules will have mass
#(2.14xx10^10)xx(18gcancel(mol^-1))/(6.022xx10^23cancel(mol^-1))~~6.39xx10^-13g#