A gaseous mixture of O2 and N2 contains 32.8% nitrogen by mass. What is
the partial pressure of oxygen in the mixture, if the total pressure is 2.40
atm?

Different isotopes indicate that an element will have different numbers of

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

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?