Two flasks are connected with a stopcock, a valve used to restrict or isolate the flow of a liquid or gas through a pipe. The first flask has a volume of 6.45 liters and contains helium gas at a pressure of 0.84 atm. The second flask has a volume of 7.75 L and contains oxygen gas at a pressure 1.75 atm. When the stopcock between the flasks is opened and the gases are free to mix, what will the pressure be in kilopascals in the resulting mixture

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Will mark brainliest how many electrons can be held in the energy level n = 4?