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

1 Answer
Meave60
Sep 6, 2017

There are 1.8xx10^241.8×1024 atoms in 1.5 mol HCl.

Explanation:

One mole of anything is 6.022xx10^236.022×1023 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

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