Chemistry 2, Ar, Mr and simplest formula

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Chemistry 2 

Topic 6 - Calcutations

Atomic Mass

The Ar of an element tells us the mass of the nucleus.-
The mass of electrons is ignored because they are too small. So, the Ar tells us the total number of protons and neutrons in that element.

Molecular Mass

The Mr is the relative molecular mass. 
For example,
       …

Comments

e=mc2

excellent

e=mc2

excellent

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