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The volume of a sample of ethane, C2H6, is 2.66 L at 447 torr and 30 °C. What volume will it occupy at standard temperature and pressure (STP)?
An aqueous solution containing 5.0 g of solute in 100 ml is extracted w/three 25 ml portion of diethyl ether. What is the total amount of solute
how efficient is the extraction of tea leaves containing 1.0g of caffeine with two 30mL portions of chloroform over that of a single-step extraction? KD= 8.36 at 25 C)
In one experiment, when 112 grams of calcium oxide was mixed with 224 grams of ammonium chloride, 16.3 grams of ammonia was produced. What is the percent yield of ammonia in the experiment
A subsequent titration revealed that the concentration of the unknown acid was 0.868 M. What was the concentration of the diluted acid om the Erlenmeyer flask?
if a nail polish remover contains 172mL of acetone how much heat is released in a complete combustion.
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 7.00 nm in diameter? Take the m..
Generate the equilibrium constant expressions for the following reaction. Calculate the numerical value for
A 22.0 L volume of an ideal gas in a cylinder with a piston is at a pressure of 3.0 atm. Enough weight is suddenly removed from the piston to lower the external pressure to 1.5 atm. The gas then expands at constant temperature until its pressure i..
A mixture of 0.146 moles of C is reacted with 0.117 moles of O2 in a sealed, 10.0L vessel at 500 K, producing a mixture of CO and CO2. The total pressure is 0.640 atm. What is the partial pressure of CO?
Combustion reactions are exothermic. The heat of reaction for the combustion of butane, C4H10, is 687.8 kcal/mol. What is the heat of combustion for butane in kcal/gram?
What is the total pressure of a gaseous mixyure that contains 3 gases with a partial pressure of 1.2atm oxygen, 0.35 atm carbon dioxide
Identify the two important classes of catalysts. Analyze the chemical reactions that take place when a biological catalyst combines
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