The above reaction scheme presents one possible synthesis of diphenhydramine. Work out the synthesis on a separate sheet of paper, and then draw the structure of compound a. Consider E/Z stereochemistry of alkenes. Do not show stereochemistry in other cases. Do not include lone pairs in your answer. They will not be considered in the grading. Draw organometallic compounds as covalent molecules. Do not draw organic or inorganic by-products.

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

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