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A student carried out a simple distillation on a compound known to boil at 124 degree C and reported an observed boiling point of 116-117 degree C. Gas boiling matographic analysis of the product showed that the compound was pure, and a calibration of the thermometer indicated that it was accurate. What procedural error might the student have made in setting up the distillation apparatus?
How could you use a conductometric titration to determine the molarity of either reacting solutions, assuming you knew the concentration of one
what volume would 7.6 grams of dry ice occupy if the density of solid co2dry ice is 1.561gml express your answer in
The molar heat of neutralization from hydrochloric acid and sodium hydroxide is -57.3 kj/mol. What is the heat evolved during the neutralization of 655ml of 1.00M hydrochloric acid by 1.00M sodium hydroxide?
The boiling point of pure ethanol is 78 degres celsius .At the first sign of condensing vapors(when maybe just one drop of distillate has been collected) do you think you have pure ethanol?why or why not
how many ml of water at 23degrees celsius with a density of 1.00gml must be mixed with 180mlabout 6oz of coffee at 95
A sample of a compound of xenon and fluorine contains molecules of a single type; XeFn, where n is a whole number. If 5.0 x 1020 of these XeFn molecules have a mass of 0.172 g, what is the value of n
The bitter-tasting compound quinine is a component of tonic water and is used as a protection against malaria. It contains only C, H, N and O. When a sample of mass 0.487 g was burned, 1.321 g of carbon dioxide
Which Orbital has the greatest value of n 2. how many orbitals have a value of l=1. 3. How many other orbitals with the same value of n would have the same general shape as orbital (b).
Estimate the overall charge on the following proteins at pH 3, 7, and 10. If a mixture of these three proteins were run on an IEF gel, what would the gel look like
a solution is prepared by dissolving 0.16 mol of acetic acid and 0.16 mol of ammonium chloride in enough water to make
0.4647g sample of a compound known to contain only carbon, hydrogen and oxygen was burned to yield 0.8635g of CO2 and 0.1767g of H2O. What is the empirical formula of the compound
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.220 M HClO(aq) with 0.220 M KOH(aq). The ionization constant for HClO
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