How many atoms are in #"1.5 mol HCl"#?

1 Answer
Sep 6, 2017

Answer:

There are #1.8xx10^24# atoms in 1.5 mol HCl.

Explanation:

One mole of anything is #6.022xx10^23# of anything, including molecules.

#1.5color(red)cancel(color(black)("mol HCl"))xx(6.022xx10^23"molecules HCl")/(1color(red)cancel(color(black)("mol HCl")))=9.0xx10^23"molecules HCl"#

Every #"HCl"# molecule contains two atoms, H and Cl.

#9.0xx10^23color(red)cancel(color(black)("molecules HCl"))xx(2"atoms")/(1color(red)cancel(color(black)("molecule HCl")))=1.8xx10^24" atoms"# rounded to two significant figures