Question

A closed container is filled with oxygen. The pressure in the container is 435kPa . What is the pressure in millimeters of mercury?

(i know that 1atm=760mm Hg=101,325 Pa)

How do I use this to solve for the question? so: 435kPa*101,325=44,076,375Pa, & O2 = 32g/mol & you must have to use 760mmHg in there somehow, but then what.
The text really doesn't discuss this much, it only shows one sample prob which only gives a psi to convert to mmHg.

& how do you solve for pressure (in atmospheres) when given a msmt in "___cm's" -in a manometer- & given the atmospheric pressure in __atm?

Answer 1

You can use the equation:

760mm Hg=101,325 Pa

You simply write it as:

Pa = 760mm Hg/(101,325)

You then substitute this in the expression for pressure in the container:

435kPa = 435k*760mm Hg/(101,325) =

435*1000*760mm Hg/101,325 = 3362.8mm Hg

Answer 2

so g/mol of oxygen has nothing to do with solving??

Answer 3

Right. The 32 g/mol has nothing to do with it. Pressure is pressure. It would be the same for any gas. Also, I think there is a typo in the number. I think it should be 3262.8 but we are allowed only 3 significant figures.

Answer 4

I had picked up on that, thank you. I had that answer before but thought it was wrong.