Compare atomic number, mass number, and atomic mass

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest