If the partial pressures are oxygen 430 torr and helium 80 torr , what is the partial pressure (torr) of the nitrogen in the mixture?

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?

Stage in which a typical star has completely stopped fusion

What is the magnitude of the force of gravity between to 1000 kg cars which are separated by distance of 25. 0 km on an interstate highway? the force between the two cars will be what