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Calculating numbers of particles

Number of molecules of oxygen in 12 moles of CO2 ?

I have started to do some calculations but im not sure what to do next i know i need to get moles of O2 out of CO2 then times that by avegadros but im not sure if im doing it correctly.

Reply 1

18MNatt(

This is what i have done so far.

Reply 2

TypicalNerd

Original post

by 18MNatt(

This is what i have done so far.

Your approach seems fine, but is perhaps a little overcomplicated.

Notice how oxygen exists as O2 molecules and so each CO2 molecule must contain one O2 molecule?

What does that tell you about the number of moles of O2 in the 12 moles of CO2?

Reply 3

18MNatt(

Original post

by TypicalNerd

Your approach seems fine, but is perhaps a little overcomplicated.
Notice how oxygen exists as O2 molecules and so each CO2 molecule must contain one O2 molecule?
What does that tell you about the number of moles of O2 in the 12 moles of CO2?