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Acetylsalicylic acid (HC9H7O4) is a monoprotic acid commonly known as "aspirin". A typical aspirin tablet, however, contains only a small amount of the acid. In an experiment to determine its composition, an aspirin tablet was crushed and dissolved in water. It took 12.25 mL of 0.1466 M NaOH to neutralize the solution. Calculate the number of grains of aspirin in the tablet (one grain = 0.0648 g).
A sample of protein weighs 0.800 g and is dissolved in 50.0 mL of water. If the osmotic pressure of the solution is 10.5mmHg at 25 degrees C, what is the molecular weight of the protein
What mass of oxygen (in grams) reacts when 14.2 g of ethanol (CH3CH2OH) are combusted in oxygen to produce carbon dioxide and water
The products were collected and had the following masses: CO2: 1.707 g N2: 0.136 g H2O: 0.7859 g For this compound (CaHbOcNd) what are the integers a,b,c and d in the empirical formula
If a mixture of argon and xenon have total pressure of 870 torr and the pressure of the argon is 539 torr., what would be the mol ratio of the gases
If 5.0 g of H2 are reacted with excess CO, how many grams of CH2OH are produced, based on a yield of 86%?
What additional piece of data would be needed to complete the calculations for the experiment
What is the vapor pressure of SiCl4 (in mm Hg) at 23.5 C? The vapor pressure of SiCl4 is 100 mm Hg at 5.4 C and Delta H
Estimate the molecular weight of a polymer if a 100.-mL solution of 6.5 g of the polymer in toluene has an osmotic pressure of 0.044 atm at 27°C.
Suppose you made up a solution in which you dissolved 4.5 g of glucose (C6H12O6) into a total volume of 200mL. What is the % w/v concentration
Why is 2-naphthol soluble in sodium hydroxide? Q.3 why is o-toluic acid soluble in sodium bicarbonate?
how much of a 6 m na2co3 stick do you need to make 100ml of a 10 na2co3 working solution. describe how you would make
Zinc(II) sulfide reacts with oxygen according to the reaction- How many moles of oxygen will be required to react with ZnS
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