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# Why is the answer C? watch

1. Why does 2g of Mg24 contain one mole of neutrons?
2. (Original post by 99sm12)
Why does 2g of Mg24 contain one mole of neutrons?
One mol of 24M is 24g. There are 12 neutrons per atom of Mg. Each neutron is 1/24th of the Ar of Mg so one mole is 1/24th of 24g which is 1g. I hope that makes sense.
3. So in Magnesium has a neutron number of 12 and so like it says above. Each of the neutron is 1/24 which is 1g
4. (Original post by Kvothe the Arcane)
One mol of 24M is 24g. There are 12 neutrons per atom of Mg. Each neutron is 1/24th of the Ar of Mg so one mole is 1/24th of 24g which is 1g. I hope that makes sense.
I dont get it. I got it by doing this:

Ar=24 therefore 1 mole of mg= 24g
Neutron n.o= 12 = 12gmol-1 and there are 12 moles of neutrons per mole of Mg

for 2g of mg, (24 divide by 12 = 2) therefoe 12 divide by 12 = 1g.
therefore 12 mole of neutrons divide by 12 = 1 mole.

SO 1 moles of n = 1g

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