a gas mixture containing oxygen, nitrogen, and carbon dioxide has a total pressure of 250 mmHg. if the partial pressure of oxygen is 50 mmHg and the partial pressure is 175 mmHg, what is the partial pressure of carbon dioxide?

Agas at 155 kpa and standard temperature has an initial volume of 1.00 l. the pressure of the gas rises to 500 kpa as the temperature also rises to 135°c. what is the new volume? 2.16 l 0.463 l 0.207 l 4.82 l

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.