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What are the [H3O+] and the pH of a propanoate buffer that consists of 0.47 M CH3CH2COONa and 0.12 M CH3CH2COOH? Ka of propanoic acid = 1.3 10-5.
Calcium hydrogen phosphate is a component of plant fertilizers (a source of phosphate). It is a relatively insoluble hydrated ionic compound, CaHPO4·2H2O, with a Ksp of 2.7×10-7 at 25°C
The first step in industrial nitric acid production is the catalyzed oxidation of ammonia. Without a catalyst, a different reaction predominates
How long will it take for 75% of nitrogen dioxide to decompose if the initial concentration of nitrogen dioxide is 1.33M
A urine sample was found to have a pH of 5.83. What would be the ratio of the unprotonated form, A, to the protonated form, HA, for uric acid in this urine sample?
Compound A reacts with water to give dimethylmalonic acid and with methanol to give the monomethyl ester of the same acid. (Compound A was unknown until its preparation in 1978 by chemists at the University of California, San Diego.)
The following equilibrium is established: 1 H2O(g) + 1 CH4(g) ? 1 CO(g) + 3 H2(g) At equilibrium 0.03264 mol of CH4 is found in the reaction mixture. (a) Calculate the equilibrium partial pressures of H2O, CH4, CO, and H2. Peq(H2O) = . Peq(CH4) = ..
How many grams of O2 are needed to react with 18.5 grams of Mg? 2 Mg(s) + O2(g) → 2 MgO(s)
The decomposition of XY is second order in [XY] and has a rate constant of 7.02x10^-3 M^-1 s^-1 at room temperature. what is the half life ( in seconds) for this reaction at an initial concentration of 0.100M? how long will it take for the concent..
snickers bar holds 1.17 megajoules of energy. How many large calories or Calories are present in a snickers bar?
In ethanol, with an absorbance of 1.210 (no units) at a wavelength of 530 nm. At this wavelength, the extinction coefficient of rhodamine 6G in EtOH is 116,000M^-1 cm^-1. If I have a 0.100 M solution of rhodamine 6G, what pathlength cell will be n..
a skyscraper in pittsburgh built in the early 1970s is supported by water filled columns. potassium carbonate was added
A sample weighing 25g starts at 99 degrees celsius. It is put in a calorimeter containing 100g water. The water temperature begins at 20 degrees and both water and sample reach equilibrium at 32 degrees. What is the specific heat of the sample?
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