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190 mL of an HCl solution with pH of 3.60 is added to 200 mL of an HNO3 solution. The resulting pH is 1.40. What was the pH of the original HNO3 solution?
A 20.0 ml sample of 0.200 M K2CO3 solution is 30.0 ml of 0.400 M Ba(NO3)2 solution. Barium Carbonate precipitates. The Concentration of barium ions, Ba^2+, in solution after reaction is?
Determine the numbers of moles of iron that would be formed from 6.2 moles of CO (carbon monoxide) combining with excess of iron (III) oxide (Fe2O 3 )?
a compound is composed of only C.H and O. the combustion of a 0.519-g sample of the compound yields 1.24g of CO2 and 0.255g of H2O.
Consider the reaction: 2 K(s) + 2 H2O(l) -> 2 KOH(aq) + H2(g), DH = ? The heat released when 24.9g of K reacts with excess water is 124 kJ. Determine the enthalpy change, DH, for the above equation as written
calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, C2H6O2 and 409 g of water.
Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg. (Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3°C.)
Application of Avogadro's law - To evaluate the volume of a gas using Avogadro's Law.
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At0?C, the volume of the gas is 248 mL. To what temperature must the gas be heated to occupy a volume of 479mL.
Calculate the pH of a buffer formed by mixing 85 ml of 0.12 M lactic acid with 95 ml of 0.15 M sodium lactate.
Calculate the vapor pressure of a solution made by dissolving 109 grams of glucose
The compression ratio of today's cars is so much higher than in cars of years past. What is the major advantage of increasing the compression ratio?
A solvent for an industrial process requires the use of phenol or benzene. Both are about the same in effectiveness for the process, and of course, gloves will be used when handling either solvent
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