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Problem- Dimethylamine, (CH3)2NH, a key intermediate in detergent manufacture, has a Kb of 5.9 x 10^-4. What is the pH of 1.5M (CH3)2NH2?
I want you to clarify the chemistry in this above problem.
if 5.50 mol calcium carbide reacts with an excess water, how many moles of acetylene will be produced?
The text states that the odor of ozone can be detected in concentrations as low as 10 ppb. In which one of the following samples/situations would you not be able to smell ozone.
An aqueous solution of weak base B of unknown concentration is titrated with a known concentration of acid, HA. Write the balanced chemical equation for this acid-base
The following processes occur in an internal combustion engine. For which one is the entropy change negative
A helium-filled weather balloon has a volume of 2.4 × 102 L at 99 kPa pressure and a temperature of 0°C. What is the mass of the helium in the balloon?
A 5.00 g sample of KBr at 25.0°C dissolves in 25.0 mL of water also at 25.0°C. The final equilibrium temperature of the resulting solution is 18.1°C.
IF 250 mg of phenacetin was dissolved in 400mL of water, explain how much will be extracted using one 100mL portion of ether. The K value is 0.0167
Calculate the pH of a solution prepared by mixing 20.5 mL of a .5 M sodium flouride solution with 32.5 mL of a .750 M hydrofluoric acid solution
Based on the mass of caffeine, you can now determine the % weight of caffeine in the original tablet. How does this compare with what the packaging states?
If you mix K2HPO4 with NaAc (sodium acetate), what is the net ionic equation for the (potential) H+ transfer? Will it take place spontaneously
what are the allowable transitions from 4d to 5f of hydrogen atoms using the quantum numbers l and m to indicate the allowable transitions
Predict the sign of delta S for each of the following changes.
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