Why does an ultraviolet light cause paint to fade

Which of the paragraphs changes subjects in the middle?

Hydrogen gas has been suggested as a clean fuel because it produces only water vapor when it burns. if the reaction has a 78.0% yield, what mass of hydrogen forms 545 kg of water?

Stars are formed from interstellar clouds because of the Law of Entropy the Law of Universal Gravitation the Law of Stellar Evolution the Law of Propulsion

What mass of NaOH is in 3.0e+02 mL of a 5.0 M NaOH solution?

Sodium has an atomic number of 11 and has a net charge of 0. When sodium combines with chlorine, it has a net charge of + 1. Why?

Which is the correct name for MgSO4•7H2O?

Iron has a density of 7.86 g/cm^3. Calculate the volume of a piece of iron having a mass of 3.99 kg.

a student determines the mass of a 100 mL beaker filled with 50 mL of water to be 154.34 grams. After a tablet reacts with the water, the mass including the dissolved tablet is 157.26 grams. Show the work and find the mass gained below.

Why does ocean water in the eye of a hurricane rise about two feet

Co (g) + h2o (g) ⇌co2 (g) + h2 (g) kp=0.0611 at 2000 k a reaction mixture initially contains a co partial pressure of 1320 torr and a h2o partial pressure of 1760 torr at 2000 k. calculate the equilibrium partial pressure of co2.