SOLUTION: What is the pressure, in mm Hg, of 39.0 g of CO2 gas at 31°C, contained in a 350 mL vessel? (VII-1) _____mm Hg

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Question 169519: What is the pressure, in mm Hg, of 39.0 g of CO2 gas at 31°C, contained in a 350 mL vessel? (VII-1)
_____mm Hg
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!
.
It follows Ideal Gas Law --------> PV=nRT, Working Eqn
where --->
Solving for n:
n=m%2Fhighlight%28MW%29
where, MW=%28NumberofAtoms%29%28AtomicWeight%29
In CO%5B2%5D, there are "2" atoms of Oxygen and "1" atom of Carbon.
Look on Periodic Table, we see Oxygen has Atomic Weight --->16. Therefore, its Molecular Weight is expressed as MW%5BO%5D=2%2A16=32
.
For Carbon, look on Periodic Table and the Atomic Weight is ---->12.
It's Molecular Weight is expressed as MW%5BC%5D=1%2A12=12
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Therefore, MW=MW%5BO%5D%2BMW%5BC%5D=32%2B12=44
Subst.: n=mass%2FMW=39cross%28g%29%2F%2844cross%28g%29%2Fmol%29
n=0.886mol
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Going Back our Working Eqn,
P%280.350%29=%280.886%29%280.0821%29%28304.15%29
P%2Across%280.350%29%2Fcross%280.350%29=cross%2822.124%2963.211581%2Fcross%280.350%29
P=63.212atm ----------> mmHg?
63.212cross%28atm%29%281mmHg%2F.001315789cross%28atm%29%29
highlight%2848044mmHg=Pressure%29, Answer
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Thank you,
Jojo