If a mixture of gases has a total pressure of 257 mmHg, and is contains 87 mmHg of N2, and 46 mmHg of O2, what is the pressure of the third gas, Ar in mmHg?
(Answer with the three significant figures, but do not include units.)

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

When balancing a chemical equation:

What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.