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A 1.95 g sample of ascorbic acid is titrated with a 0.89 M red dye. What volume of red dye is required to reach the endpoint? molar mass of red dye= 267.08g/mol; molar mass of ascorbic acid=176.12g/mol
If the methane contained in 3.00 L of a saturated solution at 25 was extracted and placed under STP conditions, what volume would it occupy.
What is the pH change of a 0.200M solution of citric acid (pKa=4.77) if citrate is added to a concentration of 0.175M with no change in volume?
How many atoms occupy 23 moles of oxygen gas? What conditions must be specified first to determine this?
In the left compartment there is nitrogen at 1.0 atm and 25°C; in the right compartment there is oxygen at the same temperature and pressure. Calculate the entropy and Gibbs energy of mixing when the partition is removed. Assume that the gases are..
Consider a saturated solution of calcium fluoride in 0.075 M potassium nitrate. Complete the following tasks, and then answer the question. (Note: Your textbook may not employ the terms Kspo and Ksp'. Please refer to the lecture notes.)
A stock solution of lactic acid is 0.04M and a stock solution of lactate is 0.25M. Calculate the pKa of lactic acid given that at these concentrations the pH is 3.90
If 24 mL of 6.2 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid?
Calculate the pH at the equivalence point for the titration of 0.170 M methylamine (CH3NH2) with 0.170 M HCl. The Kb of methylamine is 5.0× 10-4.
A 25.0 mL sample of a solution of the weak base aniline, C6H5NH2, requires 25.67 mL of 0.175 M HCl to reach the equivalence point. (Kb for aniline = 4.0 x 10-10)
Write equations for the mechanistic steps in the dehydration of cyclohexanol assuming an E1 mechanism.
transmitted by an AM radio station is given by P = 400 + 200m^2, where m is the modulation index. Find the instantaneous rate of change of P with respect to m for m
C=3R/2 Express your answer to three significant figures and include the appropriate units. part c Calculate delta U for this process, assuming that . c=3R/2 Express your answer to three significant figures and include the appropriate units part d ..
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