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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