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A 0.331-g sample of aspirin prepared in the lab was dissolved in 95% ethanol and titrated to a phenophthalein endpoint with 16.7 ml of 0.107M NaOH. Calculate moles of scetylsalicylic acid present in the aspirin sample. What mass (g) of scetylsalicylic acis is present in the sample? Calculate the percent purity of the aspirin sample.
step by step Mechanism for the reaction of butanal with methanol under acid catalyzed conditions?
A compound was analyzed and found to contain 40.00% carbon, 6.72% hydrogren, and 53.25% oxygen with a molar mass of 180.0 grams.
A gaseous mixture of O2 and N2 contains 38.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 365mmHg
Complete the following equation that illustrates a Brønsted-Lowry acid/base reaction. Phases are optional.
A black precipitate remaining from the seperation of Cr^3+ and Fe^2+ ions is dissolved in HCl and HNO3. Some NH3 is added, followed by several drops of dimethylglyoxime. (a). A colorless solution results, What do you think happened.
If you dilute 750.00 mL of a 4.117 × 10-4 M solution into a 2.00 L volumetric flask and fill to the line with water, what would be the final concentration of the solution?
CO 5) What should be the coefficient of hydrogen, H2, in the following equation in order to make it balanced? 2 Al + 3 H2SO4 ---> Al2(SO4)3 + ? H2
Using Le Chateleir's principle, explain the effect on teh cell potential of decreasing the Fe2+ ion concentration from 1.0M to 0.1M for each of the following reactions. The concentration of the other solution remains at 1.0M.
What is the freezing point of a solution that contains 23.0g of urea, CO(NH2)2, in 275mL water, H2O. Assume a density of water of 1.00 g/mL
Treatment of (S)-( )-5-methyl-2-cyclohexenone with lithium dimethylcuprate gives, after protonolysis, a good yield of a mixture containing mostly a dextrorotatory ketone A and a trace of an optically inactive isomer B
next titrates an unknown sample with this DCP solution and reaches the end point at 40.5 mL. How many mg of ascorbic acid were present in the unknown sample
Two gases, oxygen (28.8 grams) and carbon monoxide (19.0 grams), are confined in a container at a pressure of 640.0 torr. Calculate the partial pressure of carbon monoxide in torr.
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