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If a certain gas occupies a volume of 20 L when the applied pressure is 10 atm, find the pressure when the gas occupies a volume of 5.0 L.
What ions and/or molecules are present in relatively large proportions in a solution of the soluble ionic compound KCl (aq)?
A sample of chromium (III) oxide, Cr2O3, contains 0.599 g of chromium. What mass of oxygen is present
the hydrocarbon contains 93.75 carbon and 6.25 hydrogen. calculate its empirical formula.from your empirical formula
The difference in concentration must be sustained by coupling to reactions that have at least that difference of Gibbs energy
Consider the following observations taken on successive, cloudless autumn mornings. On the first day, a considerable amount of frost is on the grass at sunrise. On the second day, only dew appears on the grass. On which day is the temperature incr..
Would this reaction be an example of saponification? phenyl-COOCH2CH3 + NaOH ----> phenyl-COONa + CH3CH2OH I ruled out Aldol condensation and enolization
A mixture of CaCO3 and CaO weighing 0.630 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.500 g.
It takes 49.0 to raise the temperature of an 11.8 piece of unknown metal from 13.0 to 24.5. What is the specific heat for the metal?
pairs of soluble solutions can be mixed. In some cases, this leads to the formation of an insoluble precipitate. Decide, in each case, whether or not an insoluble precipitate is formed.
Calculate the percent ionization of 0.085 moles/l of lactic acid in a solution containing 0.050 moles/l sodium lactate
An unknown compound containing only carbon and hydrogen was burned in excess oxygen. When 7.714 grams of the compound was burned, 24.205 grams of carbon dioxide and 9.911 grams of water were produced.
For the reaction: PbCl2(s) ? Pb2+(aq)+2Cl1-(aq), what is Q* when 3.9 mL of 0.080 M lead nitrate is added to 13 mL of 0.020 M sodium chloride? Ksp of lead chloride is 1.6 x 10-5 M3.
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