7 g of table salt is added to water in a dish. The dish is then heated until all the water evaporates. This is an example of a what change? A: Physical B: Chemical

Amixture of gaseous sulfur dioxide and oxygen are added to a reaction vessel and heated to 1000 k where they react to form so3(g). if the vessel contains 0.669 atm so2(g), 0.395 atm o2(g), and 0.0851 atm so3(g) after the system has reached equilibrium, what is the equilibrium constant kp for the reaction: 2 so2(g) o2(g) ⇌ 2 so3(g)

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

How will the volume of a gas be affected if the pressure is tripled, but the temperature remains the same?