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Place a coffee cup that holds hot coffee in a cold room and let it sit there for 4 hours. Consider the coffee inside the coffee cup as your system. What is the "sign" on delta-E for this system.Select one:a. negative (-)b. We'd have to know whether the coffee is supplying heat or work to the surroundings to determine the sign of delta-E.c. There is no energy change in this system.d. positive (+)
the Williamson synthesis of the desired ether woudl favor one particular alkoxide ion-alkyl halide combination. Write the chemical equation for the formation of the favored alkyl halide, alkoxide ion, and ether.
A closed end manometer was constructed from a U-shaped glass tube which was 80.0 cm high. It was loaded with mercury so that the closed side was filled all the way to the top
Calculate the molarity and mole fraction of acetone in a 1.82 molality solution of acetone in ethanol. Density of acetone is .788 g/cm^3. Density of ethanol is .789 g/cm^3. Assume that the volume of acetone and ethanol add.
A bicycle tire is filled with air to a pressure of 100. psi at a temperature of 19 degrees celcius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees celcius.
Calculate the amount of vitamin C in mg that are titrated by one milliliter of the 0.05N iodine solution.
Calculate the Calorimeter Constant if 25 g of water at 60C was added to 25 g of water at 25C with a resulting temperature of 35C?
the density of iron is 7.874 g/cm^3 at 300K. If iron forms a body-centered cubic lattice, what is the radius of an iron atom?
What is the latent heat of vaporization Tsat in kJ/mol? (Answers are 1366 kW and 28.4 kJ/mol) Please show work for good rating.
Which statement is true concerning the reaction... N(g) + N(g) = N2(g) + energy?
A solution is prepared by dissolving 270 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
The models you have just studied represent achiral molecules. Their mirror images are identical. They are optically inactive. Any molecule that has a plane of symmetry is achiral.
A student in lab has 2.00 g of pure N2 in 0.360 g pure H2. The reaction happens following this equation:
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