During an endothermic phase change, what happens to the potential energy and the kinetic energy?
potential energy stays the same, and kinetic energy increases.
potential energy increases, and kinetic energy increases.
potential energy decreases, and kinetic energy decreases.
potential energy increases, and kinetic energy stays the same.

The pressure inside a hydrogen-filled container was 2.10 atm at 21 ? c. what would the pressure be if the container was heated to 92 ? c ?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery