Identify the molecule that effuses the fastest ch4 co ar or co2

0.09 moles of sodium sulfate in 12 ml of solution

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?