# chemistry questionWatch

#1
how do you find out the mass of one mole of a substance?
thanks
0
8 months ago
#2
Have you got the full question?
0
8 months ago
#3
(Original post by owais_148)
how do you find out the mass of one mole of a substance?
thanks
Read the relative atomic masses from the periodic table
0
#4
Thanks
0
8 months ago
#5
The equation you would use is moles = mass/mr
so you said one mole of a substance so 1=mass/mr
Mr can be found by using the periodic table using the atomic mass of the element.
0
8 months ago
#6
Moles = mass/ RFM

So:
Mass = moles * RFM

If it is 1 mole, then the mass is just the relative formula mass of the substance in grams.
0
8 months ago
#7
For example if the substance is sulfuric acid (H2SO4
then the mr is 2+16+8+8+8+8 which equals 50
So the mass of one mole of sulfuric acid is moles = mass/mr 1 =mass/50 so 50 times 1 = 50
0
8 months ago
#8
So basically the mr of the substance is the mass of one mole of the substance
0
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