NEED ASAP !! A 4.50 L sample of dry air in a cylinder exerts a pressure of 5.00 atm at a temperature of 25 oC. Without a change in temperature, a piston is moved until the pressure in the cylinder is reduced to 1.00 atm. What is the volume of the gas?

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.