Avogadro’s number

Question

I am taking a combined bio+A&P course and the whole molecules and atoms mess is confusing, but I’m getting it. But I can’t wrap my head around Avogadro’s number. Please help?

Edit: Thank you everyone! This was a huge help!!

In: 23

Answer 1

It’s more or less the number of nucleons in 1 gram of normal matter. The weight of an atom isn’t exactly given just by the number of nucleons (because of binding energy and such), but it’s close.

So for example, roughly a gram of hydrogen contains Avogradro’s number of hydrogen atoms, or roughly 12 grams of carbon contains the same number of carbon atoms.