A major volcanic eruption will occur on the mainland of the United States?

Why is an elements atomic mass not listed as a whole number on the periodic table

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

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?