Question 4 (6 points) The gas in a balloon has a volume of 7.5 L at 100, kPa. The balloon is released into
the atmosphere, and the gas in it expands to a volume of 11 L. Assuming a constant
temperature, what is the pressure on the balloon at the new volume? What law did
you use to solve?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Which statement can best be concluded from the ideal gas law?