Calculate the pH of a solution that is 0.540 M in pyridine (C5H5N) and 0.460 M in pyridinium chloride (C5H5NHCl).

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.