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The active ingredient of aspirin is acetylsalicylic acid, a monoprotic with a ka = 3.3 x 10 raised to -4 power. What is the pH of a solution dissolving two aspirin tablets, each containing 325 mg of acetylsalicylic acid, in 250 ml of water?
Suggest an indicator that could be used to provide an end point for the titration of the first proton in
The hydrogen is recovered as its most stable oxide. When the oxide was made to decompose completely it released 1.274x10^25 molecules of oxygen gas.
In a titration experiment, a 12.5 mL sample of 0.0500 M KOH neutralized 14.7 mL of HNO3 solution. Calculate the molarity of the HNO3 solution.
A hydrocarbon gas contains 81.71% carbon and 18.29% hydrogen, by mass. At STP. 4.20 L of the gas has a mass of 8.27 g. What is the molecular formula for the compound
Determine the mass of carbon dioxide produced when .85 grams of butane reacts with oxygen according to the following equation : 2C4 H10 + 13O2 ->8CO2 + 10H2O
460. mL of hydrochloric acid (HCl) acid is exactly neutralized with 485 mL 0.660 M NaOH solution. What is the concentration of the acid solution.
Calculate [w] when the gas is allowed to expand reversibly to 1 bar pressure a) isothermically and b) adiabatically.
How much 0.20mol/L sodium hydroxide should be combined to this buffer to raise the pH to 5.1? If the same amount of 0.20 mol/L sodium hydroxide were combined to 250mL of deionized H 2 O, Determine New pH?
Ammonia burns in oxygen according to: 4NH3(g) + 7O2(g) ? 4NO2(g) + 6H2O(l) ??H?_rxn^o=-1396 kJ given ?H_f^o(NH3)g = -46 kJ/mol and ?H_f^o(H2O)l = -286 kJ/mol the heat of formation of NO2(g) ?H_f^o(NO2)g (in kJ/mol) is: A) +48 B) -48 C) +34 D) -29
When 0.577 L of Ar at 1.20 atm and 227°C is mixed with 0.296 L of O2 at 501 torr and 127°C in a 400. mL flask at 27°C, what is the pressure in the flask
Consider a molecule having three energy levels as follows: State Energy (cm?1) degeneracy 1 0 1 2 500. 3 3 1500. 5 Imagine a collection of N molecules
How many kilograms of CO2 are produced from the complete combustion of 1.00L of gasoline assume that the gasoline has the formula C8H18.
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