Calculate the molality of urea in the solution
At 27 degrees celsius, the vapor pressure of pure water is 23.76 mmHg and that of an aqueous solution of urea is 22.99 mmHg. Calculate the molality of urea in the solution.
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A 35.0 mL sample of an unknown HClO4 solution requires 41.3 mL of 0.102 M NaOH for complete neutralization. What was the concentration of the unknown HClO4 solution? The neutralization reaction is:
Determine the limiting reactant and show your work. How many grams of carbon dioxide will be produced in this reaction?
Show the mechanism for the aldol condensation product of phenyl acetaldehyde with p-toluenesulfonic acid as a catalyst.
Diazomethane has the following composition by mass: 28.57% C, 4.80% H, and 66.64% N. The molar mass of diazomethane is 42.04 g/mol. Find the molecular formula of diazomethane and draw its Lewis structure.
After the reaction was complete, the unused I2was titrated with 8.27 mL of 0.02772 M thiosulfate solution. Calculate the weight of Pb(C2H5)4(MW = 323.4 g/mol) in each liter of gasoline.
Calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH(aq) with 0.1000 M NaOH(aq) after 20.22 mL of the base have been added. Ka of formic acid = 1.8 x 10-4.
The value of delta H for 2CO(g) + O2 (g) = 2CO2(g) is -482 kJ. Calculate the heat released to the surroundings when 38.5 g of O2 (g) reacts with excess CO
Which of the four main categories of biological compounds-carbohydrates, lipids, proteins, and nucleic acids-contains the highest concentration of calories?
If 24.60 mL of a standard 0.3871 M NaOH solution is required to neutralize 43.87 mL of H2SO4, what is the molarity of the acid solution?
Calculate the change in pH to 0.01 pH units caused by adding 10. mL of 2.72-M NaOH is added to 490. mL of each of the following solutions. a) water pH before mixing
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