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The hydrolysis of an ester is followed by acid-base titration. We take a sample of 30.0 cm3 from the reaction mixture which was originally a 0.02 M NaOH solution. We put the sample 50.0 cm3 0.02 M HCl solution and for the back titration of the acid we needed 25.3 cm3 0.02 M NaOH solution. Calculate the concentration of the ester which reacted.
How many grams of Neomycin sulfate should be added to 320 g of 5% neomycin sulfate ointment to prepare an ointment containing 20% neomycin sulfate
At 0.0 degrees C, if the volume of air is 1.5 mL and the pressure of the atmosphere that day is 685 mmHg, what is the number of moles of air?
assume that the wet limestone process requires 1 metric ton of caco3 to remove 90 of the sulfer from 4 metric tons of
A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon
What is the mass in grams of 1.56 moles of menthol?
Given 100 g of hot tea at 90 C what mass of ice at -10 C must be added in order to obtain a final temperture of 10 C
Calculate the standard potential for this cell at 25 °C. Standard reduction potentials can be found here.
diethyl ether is a volatile organic compound. the vapor pressur of diethyl ether is 401 mmhg at 18 degrees c and th hat
How many moles of KMnO4 are present in 25.0 mL of a 0.0900 M solution?
a 588 g chunk of iron is heated to 97.5c. then it is immersed in 247 ml of water originally at 20.7c.when thermal
write the formulas of all possible monobromination
an adult person radiates heat to the surroundings at about the same as a 100-watt electric incandescent lightbulb. what is the total amount of energy in kcal radiated to the surroundings by an adult in 24 hours?
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