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What volumes of 0.150 M acetic acid and 0.065 M NaOH solutions must be mixed to prepare 1.00L of a buffer solution of pH 4.50 at 25C.(Show all work for 5 stars)
Provided a mixture of three different compounds A, B and C to perform a chromatographic experiment using TLC. Separate experiments with the pure compounds showed the Rf values of A and B
How many grams of dry NH_4Cl need to be added to 2.10 L of a 0.700 M solution of ammonia, NH_3, to prepare a buffer solution that has a pH of 8.79? K_b for ammonia is 1.8 times 10^{-5}.
how many moles O2 of are present? (The mole fraction of in dry air is 0.2095.) How many grams of C8H18 could be combusted by this quantity of O2
Sketch the reaction profile for an exothermic reaction of 25 kJ/mol with an activation energy of 55 kJ/mol. (Be sure to label the transition state on the diagram and include quantitative data.)
Calculate the molar mass of a vapor that has a density of 1.58 g/L at 23.2 oC and 610. torr. 2. If the volume of a container is 39.4 L. and the container holds a gas at 13.2 oC. and 7.00x104 torr.
An impure sample of sodium carbonate, (Na2CO3) is allowed to react by dissolving it in an aqueous solution of 0.134 M HCl, according to the following reaction:
Determine whether each of the following causes an increase or decrease in the activity of the electron transport chain. 1. High NADH concentration
Kp for this reaction is 5.1 x 10-2 atm-1. Initially, 1.00 g each of SO2 and Cl2 are placed in a 1.00 L reaction vessel. After 15 minutes, the concentration of SO2Cl2 is 45.5 μg/mL.
A 750-mL sample of hydrogen exerts a pressure of 822 torr at 325 K. What pressure does it exert if the temperature is raised to 475 K at constant volume
Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 1.41 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution..
What molarity of aqueous magnesium chloride solution can be expected to show the same conductivity as 0.0075 M aluminum sulfate at 15,000 units.
If the O2 was the excess reagent, 8.3 mol of H2S were consumed, and 137.1g of water were collected after the reaction has gone to complain, what is the percent yield of the reaction?
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