The nucleus of one boron atom has five protons and four neutrons. determine the total number of electrons in the boron atom.

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5

An isotope undergoes radioactive decay. the new isotope that forms has an atomic number fhat is 2 less than the original isotopes. which kind of decay has occured and how do you know