Moles Question (1 Viewer)

[ghuy]

Hey everyone,

The question asks:

If 42.7g of CO reacts completely at 25 degrees celsius and a pressure of 1atm, calculate the volume of N2 gas released.

I'm not sure whether its a typo, but CO is a gas, shouldn't it be 42.7L instead?

This my solution:

1) found how many moles there were in CO using n=m/MM
2) I then found how many litres of CO was involved n=V/Vm
3) The molar ration or the coming gas ratio was 1:1 therefore same amount of CO and N2=37.7L

I think I did something wrong, but I can't point it out.

Any suggestions and help will be really helpful!

Thanks in advance!

 

[bedpotato]

What is CO reacting with?

 

[ghuy]

oh crap sorry, CO reacts completely with nitric oxide, NO

 

[bedpotato]

What do the answers say? Your answer seems right. Except, it should be 37.8L not .7
You don't round off you answer until the very end.

 

[ghuy]

I don't have solutions as of yet, but don't you have to use the n=v/vm formula for gases? Is this question a special case which allows us to use n=m/MM?

Thanks bedpotato!

 

[bedpotato]

I don't have solutions as of yet, but don't you have to use the n=v/vm formula for gases? Is this question a special case which allows us to use n=m/MM?

Thanks bedpotato!

There wasn't a typo in the question, it is 42.7g not 42.7L. The only way to find the moles of CO is to use n=m/MM.