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A gas that has a volume of 30 liters, a temperature of 46.0 degrees celsius and an unknown pressure has its volume increased to 36 liters and its temperature decreased to 35.0 degrees celsius. The pressure after the change is 2.50 atm. What was the original pressure of the gas?
calculate the quantity of heat in calories release when 241.62 g of water is cooled from 80.6degc to
Combustion of 6.51 mg of a compound yielded 20.46 mg carbon dioxide and 8.36 mg of water. At 100C and 760 torr pressure, 100 mL of the compound vapor weighed 275 mg.
what is the keq value for the acid base reaction between sulfuric acid and nitric acid? Assume that pka of the conjugated acid of nitric acid is -13.
The water level in a graduated cylinder initially at 217 rises to 286 after a piece of lead is submerged. What is the mass in grams of the lead?
Write equations to show how nitronium ions might be formed using a mixture of nitric and sulfuric acids
a current of 0.50 a passes through a copper ii sulfate solution for 15 min. how many coulombs and electrons pass
A 37.4-L volume of methane gas is heated from 22 degrees C to 78 degrees C at constant pressure. What is the final volume of the gas?
calculate the mass of the sodium. The vapor pressure of water is 23.8 mm Hg at 25.0°C. Use molar masses with at least as many significant digits as the data given.
In an excess of NH3 (aq), Cu^2+ forms a deep blue complex ion, Cu(NH3)4^2+ , which has a formation constant Kf= 5.6*10^11. Calculate the concentration of Cu^2+
What is the value of K for the reaction between hydrocyanic acid and ammonia, which is shown here
Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was banned in 1996. However, there are about 100 million auto air conditioners
Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in studies of nucleic acids. The half-life of phosphorus-32 is 14.3 days. What mass of phosphorus-32 is left from an original sample of 195 mg of Na332PO4 a..
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