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The underside of a smoky layer 14m x 9m is radiating like a flat, isotropic plate at 510°C to the floor of a compartment 2.15m below. The mean emissivity is 0.41 and the floor is homogenous/flat plate at 35°C. What is the rate of heat transfer from the smoky layer to the floor?
Suppose that a refrigerator cools to -4 degrees C, discharges heat at 20 degrees C and operates with 50% efficiency.
write the condensed electron configurations for the rm ga atom.express your answer in condensed form in order of
what is the composition of the bubbles observed when the crude methyl benzoate product is washed with sodium
what is the molality of ethanol in a solution made by dissolving 14.6g of ethanol, C2H5OH, in 53.6 g of water?
A student heated a 25.0g piece of a metal to a temp of 100.0C and placed it in 100.0g of water, initially at a temperature of 10.0C. Determine the final temperature of the system(aluminum and water)
Problem- If calcium carbonate decomposes into calcium oxide and carbon dioxide gas, what is the delta S of the reaction
a 20.00 ml aliquot of 0.120 m cu solution is titrated with a 0.100 m solution of ce4 according to the following
Problem- The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle
How long will it take for 20% of the U-238 atoms in a sample of U-238 to decay. If a sample of U-238 initially contained 1.4×1018 atoms when the universe was formed 13.8 billion years ago, how many U-238 atoms will it contain today
The label on a bottle of concentrated HCl says the contents are 36% HCl by mass and have a density of 1.179 g/mL. What is the Molarity of the Conc. HCl.
A stock solution is prepared by adding 24 mL of 0.4 M Na3PO4 to enough water to make 76 mL. What is the PO43- concentration of 25 mL of the stock solution
The temperature of a 0.750K gas sanoke at 25 degrees C and 2.00 atm is changed to 250 degrees C. What is the final pressure of the system, at constant volume
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