Which chemical equation describes the balanced reaction synthesizing copper and oxygen into copper oxide?

a. cu + o2 → cuo
b. 2cu + o2 → 2cuo
c. cu + h2o → cuo + h2
d. 2cu + 2h2o → 2cuo + 2h2

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that