How much energy is transferred to an atom that absorbs a photon with wavelength of 3.0 picometers (pm)?

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver