how do u calculate this problem...how many moles are there in 4.81x10^24 atoms?

Answer 1

Use Avogadro's number. Avogadro stated that 6.02*10^23 molecules make up 1 mole. To find the number of moles of something, divide the number of molecules (or atoms, in your case) by Avogadro's number:

(4.81*10^24) / (6.02*10^23) = 8 moles.

I hope this helps!

Answer 2

A mole is defined as 6.0221 x 10^23 and is known as Avogadro's number. It is just like commonly used counting groups such as the dozen. Therefore if you were to ask how many dozens are there in 60 bagels, you would simply divide 60 by 12 and discover that there are 5 dozens in 60 bagels.

For moles to atoms you will do the same thing. If you need to calculated how many moles are in "x" number atoms (4.81 x 10^24 in your case), you divide that number of atoms by Avogadro's number (6.0221 x 10^23).

-Christopher

Answer 3

There are 6.02 X 10^23 atoms in one mole of any substance. Simply divide 4.81 X 10^24 by 6.02 X 10^23 to get the # of moles.

Answer 4

Divide by 6.022 x 10^23

There are that many atoms in a mole so that'll give you the answer.