[Ilikebugs]

I am unfamiliar with how to solve this question. What is the relevant information and how do we use it to solve the question? I also am unsure of the units but 1 Pascal = 1Newton/square metre. Do we use PV=nRT?

http://prntscr.com/nfkh98

[sjb]

Consider typing the question out to help searching in the future. What are your thoughts?

[Ilikebugs]

The partial pressures of three gases in a 5.00 L cyinder at 1000 degrees C are as follows. CO2:239 kPa        H2:72kPa       H2O:106kPa       How many moles of CO2 are in the cylinder?

I think we can use Avogadros Law potentially?

[Borek]

If there were no other gases, just CO₂, would you be able to solve the problem?

[Ilikebugs]

(239000 Pa)(5 L)=n(8.314 J/(mol*K))(1273.15 K), so n=112.9 ish moles?

[Borek]

(239000 Pa)(5 L)=n(8.314 J/(mol*K))(1273.15 K), so n=112.9 ish moles?

You are on the right track, but if R is in J/(mol*K) units 5 (for the volume) is not in L.

[AWK]

First of all H₂ and CO₂ can not exist side by side at this temperature. Moreover, at this temperature CO₂ may partialy decompose to CO and O₂

[Ilikebugs]

Isn't the unit for J/Pa metres cubed, which is the same as a litre?

[Borek]

No, meters yield cubic meter as a volume unit, that's not L.

[Borek]

First of all H₂ and CO₂ can not exist side by side at this temperature. Moreover, at this temperature CO₂ may partialy decompose to CO and O₂

Hardly OP's fault.

[Ilikebugs]

Oh I see, 1 cubic metre is 1000 cm so the answer is around 0.113 moles. Thanks!

[Borek]

Oh I see, 1 cubic metre is 1000 cm

No. 1 metre is 100 cm, 1 cubic metre is (100cm)³.

But judging from the result when you wrote 1000 cm you meant 1000 L.

[Ilikebugs]

Just wondering, why were there other 2 gasses not necessary to find the answer?

[Borek]

https://www.chemicalforums.com/index.php?topic=99689.msg350042#msg350042

(see the discussion of the last question).