state two possible advantages and disadvantages of using nanoparticles of zinc oxide in sun creams

What is the relationship of air masses and the temperature of oceans?

Building glycogen from glucose molecules is an example of

Select the most likely product for this reaction: koh(aq) + co2(g) – ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2