The number of neutrons in an atom is equal to: A. difference between the number of mass and the atomic number
B. difference between the number of protons and the number of electrons
C. number of electrons
D. number of protons
E. number of nucleons

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

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.