[ZOEHIGAREDA]

Use the following atomic weights and quantities to calculate the overall % yield of diphenylacetylene.  Remember that your yield must be based on the limiting reagent, and that grams must be converted to moles. For problems not involving a one to one stoichiometry it may be easier to calculate the theoretical yield in grams from both reagents to determine which is truly the limiting reagent.  Filling out most of the chart will help.  Give only two significant digits in your answer.  If after rounding the answer is a whole number, do not include a decimal point.

C = 12, H = 1, Br = 80, K = 39, O = 16


stilbenedibromide+potassium hydroxide→diphenylacetylene                                                       
                   
 36.728g                7.678                                6.345

[ZOEHIGAREDA]

Use the following atomic weights and quantities to calculate the overall % yield of benzoin.  Remember that your yield must be based on the limiting reagent, and that grams must be converted to moles. For problems not involving a one to one stoichiometry it may be easier to calculate the theoretical yield in grams to calculate the % yield.  Filling out most of the chart will help.  Give only two significant digits in your answer.  If after rounding the answer is a whole number, do not include a decimal point.

C = 12, H = 1, Cl = 35.5, N = 14, Na = 23, O = 16, S = 32


                 thiamine hydrochloride         +               sodium hydroxide   +      benzaldehyde               →                  benzoin
formula                           
formula weight                       
 grams                    5.831                                    0.942                           8.324                                        4.245      
 moles                           
                                                                                                               theoretical yield (g)    
                                                                                                                                          % yield
               

[Borek]

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You have to show your attempts at solving the question to receive help. This is a forum policy.

[orgopete]

Hint, how many moles of each chemical are present in the starting materials and products?