How many atoms are in 2.70 moles of iron (Fe) atoms?

4.48 × 10-24 atoms Fe
1.63 × 1024 atoms Fe
2.23 × 1023 atoms Fe
6.02 × 1023 atoms Fe

Question

How many atoms are in 2.70 moles of iron (Fe) atoms?
 	
	4.48 × 10-24 atoms Fe
	1.63 × 1024 atoms Fe
	2.23 × 1023 atoms Fe
	6.02 × 1023 atoms Fe

superhelp101 · Answer

@iPwnBunnies how do you solve this?

ipwnbunnies · Answer

Use Avogadro's Number. Since we're dealing with atoms of an element. There are 6.02 *10^23 atoms in one mole of an element.
Find a conversion factor to find the amount of atoms in 2.70 moles. :3

superhelp101 · Answer

wait how do you know to use Avogadro's number?

ipwnbunnies · Answer

Just because of the situation. They just ask how many atoms are in 2.70 moles of iron. It doesn't matter which element it is, there will always be 6.02 * 10^23 particles in a mole.

superhelp101 · Answer

ohh. ok let me solve it

superhelp101 · Answer

the second one correct?

ipwnbunnies · Answer

Yesh.
$$2.70 moles * \frac{6.02 * 10^{23} atoms}{mol} = 1.63 * 10^{24} atoms$$

superhelp101 · Answer

yay! thank you!