Which gas law is for this? For a container at a constant temperature and pressure there is an increase in volume when more molecules of a gas are added.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

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.

The chemical formula for emerald is be3al2(sio3)6.an emerald can be decided as