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Suppose you have an electric hot water heater for your house which is an aluminum cylinder which has a 0.56 m radius and is 1.8 m high. The walls are 1.0 cm thick. The thermal conductivity of Aluminum is 217 W/(m K). Assume that the temperature of the hot water inside the hot water heater is kept at a constant 90 C, and the external temperature is 27 C. How much energy is lost through the walls of the hot water heater in one week? (Assume thinner surface of the heater is 90 C and the outer surface is 27 C.)
Which would have a higher energy of activation and why, nitration of 4-bromonitrobenzene or nitration of bromobenzene
If the heating is carried out in a container fitted with a piston that was initially resting on the solid, calculate the work done by the piston on the surroundings during the complete decomposition. The pressure of the surroundings is 0.998 bar.
What is the molarity of the concentration HCl (concentrated HCl is 37.2% by mass). How did you find this value? Using the molarity show that 7ml of concentrated HCl diluted to 2.0L with distilled water yields a solution that is about 0.10M HCl.
How is the mass in amu of one atom of an element related to the mass in grams of one mole of the element?
The acid dissociation constant for hypochlorous acid (HClO) is 3.0x10-8. Calculate the concentrations of H3O+, ClO- and HClO at equilibrium if the initial concentration of the acid is 0.05 M. What is the pH? I made an ice table and found x to be 3..
Given 6.4 mL of sulfuric acid (98%) calculate the number of mmols. (MW H2SO4: 98.08 g/mol, density: 1.840 g/mL)
a student placed 17.5 g of glucose in a volumetric flask added enough water to dissolve the glucose by swirling then
write a 700- to 1050-word paper based on the week one readings on the field of gerontology in which you describe the
Mg + 2HCl --> MgCl2 + H2 For a mass of 0.013 g Mg and 5.0 mL of 1.00 M HCl, in a flask with V = 140.612 mL at 23.5?C. Calculate the vapor pressure of H2 and vapor pressure of water.
Calculate the capacitive reactance, the impedance, and the phase angle, phi, for a series RC circuit having a frequency, f of 1.00e+04 Hz, resistance,
Determine the molar heat capacity of a solid sample from the observation that transferring the sample with n = 2.45 mol from boiling water (at constant ambient pressure) into 232.0 g of water initially at 25.1ºC raised the water temperature to 33...
Do the same to show the formation of both elimination products from 2-bromo-2methylbutane (page 208 lists the two products as 2-methyl-1-butene and 2-methyl-2-butene.)
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