Atom a has an atomic number of 19 and a mass number of 40. atom b has an atomic number of 20 and a mass number 40

What happens to energy in an open system?

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible?

What’s the scientific notation for the number 6,840,000,000