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When ammonium nitrate is added to water, the temperature of H2O drops, but when sodium hydroxide is added to H2O, the temperature rises. Explain why the temperature of water can change in different ways when an ionic substance is added.
The butylammonium ion, C4H9NH3^(+), has a Ka of 2.3x10^(-11) C4H9NH3^(+) + H2O > H3O^(+) + C4H9NH2 A. Calculate Kb for the conjugate base, C4H9NH2 B. What is the pH of a 0.015M solution of butylammonium chloride
Which of the following substances are largely ionic, and which are covalent. (a) HF (b) HI (C) PbCl2 (d) BBr3 (e) NaOH (f) CH3Li
The boiling point elevation of an aqueous sucrose solution is found to be 0.39*C. what mass of sucrose molar mass 342.30 g/mol would be needed to dissolve in 500.0g of water? Kb (water) = 0.512*C/m
If you fill the larger tank with oxygen to a pressure of 155 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
A 10.3 mL sample of a HCl solution has a pH of 2.000. What volume of water must be added to change the pH to 4.000?
A solution is prepared by dissolving 27.1 g urea, (NH2)2CO, in 171.2 g water. Calculate the boiling point of the solution. Urea is a nonelectrolyte.
Draw one energy diagram showing both reaction pathways & label all transition states, intermediates and products as well as activation energies.
Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol vaporizes at 25.
Determine At what temperature does C 6 H 6 boil when the external pressure = 470 torr?
What is the percent yield of CO2 if the expected theoretical yield is 8.11·10-3 mol? Vapor pressure of water at 20.0 oC is 17.55 mmHg .
Nitrogen dioxide and water react to produce nitric acid HNO3 and nitrogen monoxide. 3NO2(g) + H2O(l) --> @HNO3(aq) + NO(g)
Phosphorus-32 has a half-life of 14.0days . Starting with 6.00g of 32p , how many grams of phosphorous will remain after 42.0days.
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