A 5.00 L sample of hydrogen gas held at 22.0°C has a pressure of 4.20 atm. What will the pressure of the gas be if the volume of the sample
expands to 10.0 L and the temperature increases to 33.6°C?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.