The Mole. -How do we determine the amount of a substance? -Calculating molar mass. The amount of substance. Scientists talk about the ‘amount of substance’ What this means is how many atoms we have in a given amount of a substance. This is given the symbol n and the unit is the mole .
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-How do we determine the amount of a substance?
-Calculating molar mass
NA= 6.02 x 1023 mol-1
n= number of moles, mol
M= molar mass, gmol-1
m= mass, g