What is the energy of light whose wavelength is 4.06x10^-11 m?

Iwll give extra points to who gets this for ! what type of reaction is this? ?

How manyatoms of mercury are in 1.4214e+1 ml sample

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%