Destroyer Help: Gen. Chem #147

[busupshot83]

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In problem 147 in the General Chemistry section (it's part of the updates), why are we using P1V1 = P2V2 to find the partial pressure of each gas, and not the partial pressure formula (Partial Pressure = PTotal x Mol Fraction)?

 

[Danny289]

Ok, lets analize the question maybe it would help,

you can simliplize this question in this way, please follow my explanation:

we have a container of volum 100 ml that contains "N2" with 2 atm pressure, and another container of volum 200 ml that contains "Ar" with 4 atm pressure,
we obtain one 300 volum container and transfer "N2" and "Ar" gases in this new container. assume the temprature is constant, find the total pressure of mixed gases in new container! just pay attention dear busupshot83 total Pressure not partial!! then if you want you can calculate partial pressure for each gas in new container(300 ml) but first you have to find total pressure as Dr Romano's solution.
I hope now you can follow Dr Romano's soultion for this problem.

But now new challange, 🙂 I am going to open new thread (just for break that we need that very bad) , you can think and participate . even you can send that thread to Dr Romano, with my all deep respect for him. Dr Romano has done great job for pre-dental students.
Thanks Dr Romano for your remarkable Book
The thread will be :
Q# 147 G chemistry Destroyer, Find Dr Romano's mistake!

 

[busupshot83]

Ok, lets analize the question maybe it would help,

you can simliplize this question in this way, please follow my explanation:

we have a container of volum 100 ml that contains "N2" with 2 atm pressure, and another container of volum 200 ml that contains "Ar" with 4 atm pressure,
we obtain one 300 volum container and transfer "N2" and "Ar" gases in this new container. assume the temprature is constant, find the total pressure of mixed gases in new container! just pay attention dear busupshot83 total Pressure not partial!! then if you want you can calculate partial pressure for each gas in new container(300 ml) but first you have to find total pressure as Dr Romano's solution.
I hope now you can follow Dr Romano's soultion for this problem.

But now new challange, 🙂 I am going to open new thread (just for break that we need that very bad) , you can think and participate . even you can send that thread to Dr Romano, with my all deep respect for him. Dr Romano has done great job for pre-dental students.
Thanks Dr Romano for your remarkable Book
The thread will be :
Q# 147 G chemistry Destroyer, Find Dr Romano's mistake!

I understand the problem now... it's a little tough at first though.

 

[PD3]

So what is the official answer?