Consider COX2 molecule, assuming X is chlorine. 1) Use your…

Consider COX2 molecule, assuming X is chlorine. 1) Use your own words, describe each and every bond(s) in this molecule (e.g., single, double or triple). 2) What’s the expected bond angles? Explain how you get your conclusion. Mark your answer next to words “Final answer is”.

An element analysis of a Na2HPO4∙2H2O sample shows that the…

An element analysis of a Na2HPO4∙2H2O sample shows that the sample contains 15.46 grams of sodium.  Without further experiments, predict the mass of oxygen in this sample in grams.   Mark your answer next to words “Final answer is”. You must follow significant figure rules.  Must show your work here to receive full credit.