For each of the following redox reactions in the, identify the oxidizing agent and the reducing agent.
2na(aq)+2h2o(l)→2naoh(aq)+h2(g)
c(s)+o2(g)→co2(g)
2mno−4(aq)+5so2(g)+2h2o(l)→2mn2+(aq )+5so2−4(aq)+4h+(aq)

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

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?

Which diagram represents the phase tha occurs after a solid melts?