How heavy is a mole of things

The number is calculated so that a mole of any compound weighs as much as its molecular formula expressed in grams.

For example, the formula mass of ethane() is 18 atomic mass units. The mass of ethane molecules weigh 18grams.

The atomic masses of some elements are listed
C=12, O=16, N=14, Be=4, H=1.

Compound

 

Formula mass

(atomic mass units)

Mass of

 
1 mole =
2 mole =
10 mole =
0.1 mole =
0.5 mole =
2.5 mole =
0.2 mole =

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