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Which of the following statements is true? (Multiple answers possible) Answer A. At the equivalence point the amount of reagent added is equal to the amount of analyte present. B. The endpoint does not correspond to the equivalence point. C. The endpoint corresponds to the equivalence point. D. At the equivalence point the amount of reagent added does not yet equal to the amount of analyte present. E. There is no error associated with the difference in equivalence and end points. F. The equivalence point cannot be determined by a color change of an indicator. G. At the end point a change in a physical quantity associated with the equivalence occurs.
What is the concentration of KOH for the final solution?
What is the mole fraction of ethanol in a solution made by dissolving 14.6 g of ethanol in 53.6 g of water?
the osmotic pressure generated was 6.65atm at 298K. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound.
Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.651kJ of heat. It shrinks on cooling, and the atmosphere does 384J of work on the balloon.
What mass of solid sodium hypochlorite (molar mass = 74.44 g/mol) should be added to 1.0 L of 0.255M hypochlorous acid to make a buffer with a pH of 7.54? (Ka of HClO = 3.8 x 10-8)
If 8686 C of charge is passed through molten magnesium chloride, calculate the number of moles of Mg(l) produced
A standard Na solution with a concentration of 1.75 ?g/mL Na is added to an unknown concentration of Na. Based on the data below, determine the original concentration of Na as well as its uncertainty in a pure unknown sample.
clockwise direction around a circular track with a constant speed of 200 km/hr. if is at the southernmost end of the track then determine the velocity of the car?also express your answer in M/S
A gas mixture being used to simulate the atmosphere of another planet consists of 319 mg of methane, 171 mg of argon, and 212 mg of nitrogen
A sample of H2SO4 contains 1.11 grams of H (1.01 g/mol). How many moles of H2SO4 (98.02 g/mol) are present?
A volume of 40.0 of aqueous potassium hydroxide () was titrated against a standard solution of sulfuric acid (). What was the molarity of the solution if 19.2 of 1.50 was needed? The equation is 2KOH(aq)+H2SO4(aq)=K2SO4(aq0+2H2O(l)
Are interested in isolatin menthol from a min leaf. You have pureed 12g of mint leaf and completed steam distillation using 35 mL of water.
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