Question
Tue January 15, 2013 By:

what is the mole concept

Expert Reply
Wed January 16, 2013

One mole is defined as the amount of substance of a system which contains as many entities like, atoms, moleculesand ions as there are atoms in 12 grams of carbon 12".

The number of atoms present in 12 grams of carbon 12 which is equal to 6.023X 1023 . This is also known asAvogadro's constant.

  • The atomic mass of an element is the mass of one atom of that element in atomic mass units (u).

Molar mass of an atom is also known as gram atomic mass.

3 moles of carbon dioxide are present in 132 grams of carbon dioxide
4 moles are present in 24.088X1023 particles of carbon dioxide
48 grams of magnesium contains 12.04 X 1023 atom
3.6 grams of water 1.206 x 1022 molecules
The number of atoms in 0.5 moles of carbon is 3.0115 X 1023
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