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An impure sample of benzoic acid (C6H5COOH, 122.12g/mol) is titrated with 0.9855 M NaOH. A 3.412g sample requires 24.43ml of titrant to reach endpoint. What is the percent by mass of benzoic acid in the sample?
How can I find the pH and volume (mL) of 0.0411M KOH needed to reach the equivalence point in the titration of 23.4mL 0.0390M HNO2? The question doesn't give me a Ka or Kb value.
Consider the following approximate figures relating to cigarette smoking and cancer. The death rate in the US population of 270 million is 15 deaths per 1000 persons per year. One-fifth of these deaths are from cancer and one-fourth of the cancer ..
If 12800 calories is required to change 45g of substance X from a liquid to a gas, what is the heat of vaporization of substance X?
Two samples of copper and lead both weighing 1.500g each recive equal amounts of heat. The temp. of copper increased from 25.0 degrees celcius to 30.0 degreees celcius.
Neutrons like electrons as well as photons are particle-waves whose diffraction patterns can be utilized to determine the structures of molecules. Compute the kinetic energy (in J) of a neutron with wavelength 69.7 pm.
30.3 g of chromium(III) oxide reacts with 10.8 g of aluminum to produce chromium and aluminum oxide. If 20.7 g of chromium is produced, what mass of aluminum oxide is produced?
A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 L and the initial pressure of chlorine was 1.45atm The piston was pushed down to change the volume to 1.00 L
Draw (R,S)-1,2-diammoniumcyclohexane. Draw its enantiomer. Name its enantiomer. Are these compounds the same or different
can be isolated from the bark of wild cherry trees. Show the reactants that you would use to synthese scopoletinc
Suppose 93.0 g of HI(g) is placed in a glass vessel and heated to 1107K. At this temperature, equilibrium is quickly established between HI(g) and its decomposition products, H2(g) and I2(g)
The choice of precipitating reagent is important. Briefly explain what the consequences would be if excess 6M NaOH solution instead of 6M NH3 solution were used to separate Fe3+ and Al3+ ions from Ca2+, Cu2+, and K+ ions at pH 9-10.
Assuming that conductivity is correlated to the number of ions in solution, rank the four substances based on how well a 0.20M solution in water will conduct electricity.
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