Science Buddies: "Ask an Expert"

HI,
I am trying to figure out this question which my science teacher gave to me. It is part of our science grade and we get more points the sooner we turn in an answer, I have been look ALL over the web and books, but can't seem to find the answer. I don't know much about the specific subject and how it works, so please help on that too! Please help... Thank you! Colleen

question:

If 75 cm cubed of a gas is at STP, what volume will the gas occupy if the temperature is raised to 75 degrees Celsius and the presure is increased to 945 torr?

Hi and welcome to the forums! This seams like a standard science question, not a science fair question, but you can find the answers you need on the web. First, try Wikipedia: http://en.wikipedia.org/wiki/Ideal_gas_law and http://en.wikipedia.org/wiki/Standard_c ... d_pressure. If that doesn't help, try posting again.

Keith

If 75 cm cubed of a gas is at STP, what volume will the gas occupy if the temperature is raised to 75 degrees Celsius and the presure is increased to 945 torr?

You will need to understand the combined gas laws, found under this link:
http://en.wikipedia.org/wiki/Combined_gas_law
This means that if a gas under a specific pressure and temperature is a certain volume,
a change in pressure and temperature will change the volume proportionately

Since the pressure you are using is torrs, you will need to know that
torr = 1/760 atm
In other words, 760 torr = 1 atm

Hope that helps