Question
Sun November 27, 2011 By: Venkataravind Mohan

can you explain mole concept?

Expert Reply
Sun November 27, 2011

In chemistry the mole is a fundamental unit in the SI system. It is used to measure the amount of substance. This quantity is sometimes referred to as the chemical amount. In Latin mole means a "massive heap" of material. It is convenient to think of a chemical mole as such.


1 mole of molecules has a mass equal to the molecular weight in grams.

examples

1 mole H2O is the number of molecules in 18.015 g H2O

1 mole H2 is the number of molecules in 2.016 g H2.

1 mole of atoms has a mass equal to the atomic weight in grams.

1 mole of particles = 6.02214 x 1023 particles for any substance!

Prove this by converting 1 mole to grams to daltons to particles for any substance.

 

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