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What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA-, A2-) at pH 8.44?
A carbon-hydrogen compound is burned in an excess of oxygen to give 1.76g of carbon dioxide and 0.900g of water as the products of combustion. What is the empirical formula of the organic compound
Description of Intermolecular forces, What parts of the calcium chloride are attracted to what parts of the water molecule when calcium chloride dissolves
An iron ore sample is a mixture of Fe2O3 and several impurities. A 752. g sample of the impure iron ore is heated with excess carbon.
Experiments have shown that the average frequency of chirping by a snowy tree cricket depends on temperature as shown below.
Xenon can be the central atom of a molecule by expanding beyond an octet of electrons. Draw Lewis structure for the following xenon compound.
What mass of lead sulfate is formed in lead-acid storage battery when 1.10 g of Pb undergoes oxidation?
Find the solubility of AgI in 2.5 M NH3 (Ksp of AgI = 8.3x10^-17 and Kf of Ag(NH3)^2+ = 1.7X10^7)
The accepted value (mu) for a standard sample of chloride was 34.63 percent chloride. Triplicate analysis of this material by a new procedure yielded a mean value of 34.71 and an estimated standard deviation of 0.04
100.0 mL of 1.020 M HCl and 50.0 mL of 2.040 M NaOH, each at 24.53ºC, are mixed in a Styrofoam cup calorimeter. What is the final temperature of the mixture if the heat of acid-base neutralization (?Hneut) = ?57 kJ per mole of H2O formed
Compute the mass of an electron if the difference in the mass of 100 moles each of sodium atoms and sodium ions is 5.48002 grams?
What is the molecular formula for the alkane with 39 carbon atoms? What is the molecular formula for the cycloalkane with 38 carbon atoms?
Write a chemical equation for the formation of methionyl glycine from the constituent amino acids.
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