Question

Question #bd24c

Answer 1

See below.

Explanation:

This is a dimensional analysis problem with the following setup:
`(7.370*10^25) * ((1mol)/(6.022 *10^23))`
The answer is obtained once you plug it into your calculator:

`122.3` moles Cl2

Answer 2

`122.4 " mols Cl"_2`

Explanation:

Since Avogadro's number (`6.02214179×10^23`) is the number of molecules in one mole, all you have to do is divide the given molecules by Avogadro's number.

`(7.370*10^(25)"molecules")/(6.02214179×10^23"molecules"*"mole"^(-1))`

`(7.370*10^(25)color(red)(cancelcolor(black)"molecules")color(red)" mols")/(6.02214179×10^23color(red)(cancelcolor(black)"molecules")*color(red)(cancelcolor(black)("mole"^(-1)))`

`122.381708319 " mols"`

Due to the 4 significant figures, the answer would be:

`122.4 " mols Cl"_2`