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Based upon your experiences, suggest what would be the result if we heated a mixture of dichloromethane (bp 39-40 Celcius) and nappthalene (C10H8 with mp 80-82 degrees celcius and bp 218) to 60 degrees celcius, collected distillate until no further meaterial distilled, and then cooled the flask back to room temperature. (This type of mixture might be obtained at the end of an extraction experiment starting with a mixture of benzoic acid, benzocaine and naphtalene)
A gas expands in volume from 34.9mL to 74.1mL at constant temperature. Calculate the work done (in joules) if the gas expands against a constant pressure of 2.1atm. Enter your answer in scientific notation.
The sample is placed in a drying dish (weight = 0.5000 g before the sample is added), and then placed in an oven at 104°C until all the moisture is evaporated.
What would happen to the % Transmittance value if the wavelegth is changed from 447nm to 520 nm
You are a laboratory assistant for your chemistry course. There are 250 students in the course, and each needs to use 25 mL of a 0.15 M solution of copper sulfate.
MnSO4 is converted to MnO2 in a basic medium as oxygen gas is converted to hyroxide ion. In this case, is the sulfate ion a spectator ion. (NaOH is also present. Is sodium ion also a spectator ion) A. Print the oxidation half-equation B
Determine the pH of an aqueous solution of CaCO3 that contains 1.7*10^-6 M of hydroxide ion [OH^-].
What is the empirical formula for a compound that contains 20.11 % hydrogen and 79.89 % carbon
Draw four structures corresponding to dihedral angles of 0, 60, 120 and 180 degrees. Clearly indicate the best and worst in this set.
Calculate the equilibrium amounts if initially 0.1 moles H2 0.2 moles I2 are mixed and equilibirum is established at 300K. Kc at this temperature is 70.
At 900K the following reaction has Kp=0.345. 2SO2 + O2->2SO3. In an equilibruim mixture the partial pressure of SO2 and O2 are 0.145 atm and 0.470 atm respectively. What is the equilibruim partial pressure of SO3 in the mixture
Calculate how much you would obtain wiht 1 x 0.6 mL extraction. 3. Which method is more efficient.
what is the total energy in kj needed to raise 20 g of ch4o methanol from - 120 degc to 100 degc? show your work.change
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