Question #bd24c

2 Answers
Apr 24, 2017

Answer:

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

Apr 24, 2017

Answer:

#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#