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A 6280 g solution of chloroform and (CH3)2CO contains 1.22 kg of CHCl3. Calculate the mole fraction of chloroform in the solution.
The osmotic pressure of a solution formed by dissolving 85.0 mg of aspirin (C9H8O4) in 0.250 L of water at 25 °C is __________ atm.
Ethyl alcohol is produced by the fermentation of glucose, C6H12O6. Given that the enthalpy of formation is -277.7 kJ/mol for C2H5OH(l) and -393.5 kJ/mol for CO2(g)
A laser pulse of light with a frequency of 1.14 × 1020 Hz contains 2000 photons. Calculate the energy in J of the pulse.
A solution of 350mg of optically active 2-butanol in 10 mL of water, placed in a 20 cm cell shows an optical rotation of +6 .24 o. What is the specific rotation of this compound
A small collection of dimes and quarters are submerged in 10.00 mL of water in a graduated cylinder causing the water level to rise to the 18.87 mL mark. What is the combined monetary value (in Can$) of those coins?
A student measures the volume of water delivered by a 1 mL volumetric pipette several times and records measurements of 1.00, 0.97, 1.03, 1.01 and 1.03 mL. What is the average of the five measurements. Report your answer to 5 significant figures a..
calculate the mol O2 added in the air, using the fact that the N2 in the ?ue gas equals the N2 added in the air. Then make a carbon balance to obtain the total moles of C added.)
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodim (minimum) are needed to absorb 4.70 MJ of energy (in the form of heat) if the temperature of the sodiumis not to increase by more than 10.0 C
Explain why electrically neutral objects can become electrically charged even though charge cannot be created or destroyed.
Calculate the H3O+ ion concentrationand pH of a solution formed by adding 215 mL of .100 M acetic acid (CH3COOH) to 215 mL of .0500 M sodium acetate (NAOOCCH3).
the solubility of n2 in water is 2.2 x 0.0001 g in 100 g of h2o at 20 celcius when the pressure of nitrogen over the
glucose-6-p is a branch point intermediate which is used in three different metabolic pathways.nbspidentify name each
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