Which elements contain atoms that form colored ions and have more than one positive oxidation state

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?

Nonpoint source pollution is difficult to control because it

The number at the end of an isotope’s name is the number.