What is the mass of #2.94 times 10^24# molecules of decane #C_10H_22#?

1 Answer
anor277
Apr 5, 2017

Well, #6.022xx10^23# individual decane molecules have a mass of #142.3*g#

Explanation:

#6.022xx10^23# individual items of stuff specifies a #"mole of stuff"#. The #"mole"# relates the (sub) micro world of atoms and molecules to the macro world of grams and litres.

And thus...............................................

#"mass"=(2.94xx10^24*"molecules")/(6.022xx10^23*"molecules"*"mol"^-1)xx142.3*g*"mol"^-1~=700*g#

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