# Can someone explain why 56g of iron is 1 Mol?Watch

#1
I know that a mole is a certain number of atoms.
but why is 1g of hydrogen = 1 mole or 2 grams of helium=1 mole.
0
3 weeks ago
#2
Simply, a mole is just a number of things in a similar way that:

2 = 1 pair
12 = 1 dozen
6.022x1023 = 1 mole

So

6.022x1023 of any atoms is 1 mole
0
3 weeks ago
#3
A mole is just the right number of something that you can tell the mass by the atomic or molecular number.

So if the atomic/molecular number of a thing is some number n, then a mole of it will weigh n grams.
Iron has a mass number of 56, so a mole of iron atoms will have a mass of 56g.

Works with molecules too. CO2 has a relative molecular mass of 44 (12 + 16 + 16) so a mole of CO2, or Avogadro's number of CO2 molecules, will have a mass of 44g.
Last edited by Sinnoh; 3 weeks ago
0
3 weeks ago
#4
A general chemistry rule is that the mass of 1 mole of any substance is the same as the atomic mass of that substance:
E.g
1mol Carbon is 12g
1 mol Oxygen is 16g
0
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