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modify the 3 molecules so that they show the form that is dominant at physiological pH: formic acid, acetylsalicylic acid (aspirin), and citric acid
A buffer solution is made by dissolving 0.45 moles of a weak acid (HA) and 0.33 moles of KOH into 800 mL of solution. What is the pH of this buffer? Ka = 5.9 × 10-6 for HA.
Assume you 0.010 mol of N2O4 (g) in a 2.0L flask at 50 degrees Celcius. After the system reaches equilibrium, [N2O4] is 0.00090 M. What is the value of Kc for this reaction
What is the concentration of the dilute aspirin? a. What is the concentration of the aspirin in the dilute aspirin solution? b. What is the concentration of the original solution ? C. How many mg of aspirin are present in one tablet of Brand Y asp..
determine at what temperature must a balloon be heated to have six litres volume consider that the balloon was at the
If 10 grams of an organic layer is extracted with an additional amount of fresh water, how much benzoic acid would be present in the organic layer
what is the solubility of O2 at an elevation of 12,000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25°C
which had been effectively diluted to a volume of 200mL? b) how many grams of Cu were in the sample? c) how many grams of Cl were in the sample? How many moles? d) What is the formula of the copper chloride compound?
What is the mass (by difference) of a sample if the initial mass of the sample in the bottle was 27.68-g and the final mass of the bottle and sample was 23.63-g?
What is the pH after 0.150mol of HCl is added to the buffer from Part A. Assume no volume change on the addition of the acid. Express the pH numerically to two decimal places.
For the reaction CO(g) + H2O(g) CO2(g) + H2(g), Kp = 0.64 at 900 K. If the reaction is initiated with just H2(g) and CO2(g), each at a partial pressure of 0.540 atm, what is the partial pressure of CO(g) at equilibrium
Calculate the standard cell potential (E) for the reaction X(s)+Y+(aq) -> X+(aq)+Y(s) if K = 5.33 x 10^-3. Express your answer to three significant figures and include the appropriate units.
a particular first-order reaction has a rate constant of 1.35 times at 25degc. what is the magnitude of k at 95degc if
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