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A mixture of sulfuric acid and NaOH has a pH of 1.9. Which of the following is true about the mixture at equilibrium? Note: For H2SO4,
Ka1 is very large and Ka2is 1.1 x 10-2) A. [H2SO4] > [HSO4-] > [SO42-] . B. [HSO4-] >[H2SO4] > [SO42-]
C. B. [HSO4-] > [SO42-] >[H2SO4] D. [SO42-] > [HSO4-]>[H2SO4]
E. [SO42-] >[HSO4-]>[HSO4-]
Why is it important to recrystallize the chalcone before proceeding with the hydrogenation reactions?
Determine the percent yield for the reaction between 3.74g of Na and excess O2 if 5.35g of Na2O2 is recovered
What is the molarity of a solution that contains 20.0 g of calcium chloride, CaCl2, in 1200. mL of a solution? The molar mass of CaCl2 is 111.1 g.
Consider the reaction between 50.0mL of 0.200 M sodium hydroxide and 75.0mL of 0.100 M HCL. Which of the following statements is correct
A mercury mirror forms inside a test tube by the thermal decomposition of mercury(II) oxide. 2 HgO(s) 2 Hg(l) + O2(g) Hrxn = 181.6 kJ (a) How much heat is needed to decompose 504 g of the oxide? kJ
what kind of product distribution and what does that tell you about the operating mechanism and the factors that affect product distribution?
Calculate the amount of water that must be supplied to a heat exchanger that cools 100 kg/hr of tomato paste from 90C to 20C. The water enters the heat exchanger at a temperature of 8oC
The air passes through a working section of area 0.04 m2 and exits to a large vacuum vessel. Find the pressure, density, velocity and mass flow rate in the working section if the Mach number there is 4.0.
What type of interaction does Ultraviolet, Visible, and Infrared regions of the spectrum have with matter?
kcl has the same structure as nacl face-centered. the length of the unit cell is 628 pm. the density of kcl is 1.984
particulat reaction doubles between 273k and 283k , calculate the value of the activation energy for the reaction.
If the C-14 : N-14 ratio in a shell in a sandstone was found to be 1 : 3, how old is the shell?
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