Combustion analysis of an unknown compound provides the following data: 73.5 grams c, 4.20 grams h, and 72.3 grams cl. what is the percent composition of each element in this compound? 73.5% c, 4.20% h, 72.3% cl 48.0% c, 3.00% h, 50.0% cl 17.5% c, 1.00% h, 17.2% cl 49.0% c, 2.80% h, 48.2% cl

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!