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Problem- If the weight limit for a roof is 55 lbs/ft^2, how many inches of snow can be on the roof before it must be removed? again assume that 10 inches of snow is equivalent to 1 inch of liquid water if melted. liquid water is 62.4 pounds/cu-foot (lbs/ft^3)
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The reaction is CaO(s) + H2O(l) ? Ca(OH)2(aq) -- ?H = -83.7 kJ Assume the heat capacity of the solution is the same as pure water (4.184 J/g*°C), the density of the solution is 1.00 g/mL and there is no loss of heat to the surroundings.
What is the molecular weight of a gas if a 21.0 g sample has a pressure of 836 mm Hg at 25.0 C in a 2.00 L flask?
Ever since volume is proportional to the number of moles present mole fractions of gases can be expressed as ratios of volumes at the same temperature and pressure. Compute the concentration of each gas in moles per liter at 0°C.
What is the concentration of a solution made from 15ml of 2.0M HBrO, 20.0ml of H20, and 9.7g HBrO (mm=97g/mol)
calculate the volume of 0.050M Barium Hydroxide solution that contains the same number of moles
For a given chemical reaction, ?H = -32.0 kJ/mol and ?S = -98.0 J/mol*K. Estimate the free energy change for the reaction at 775 C and 1 bar pressure. I believe it to be 70.7 kJ/mol
what is the volume of 340. ml of a sample of gas at 55.0degc and 740. mm hg if the conditions are adjusted to stp?
Explain if you dissolve .95 grams of an unknown salt into 13 grams of Benzene (C6H6) as well as find that the new freezing point is 2.78°C, define what is the Molar Mass of the unknown
the molar heat of neutralization from hydrochloric acid and sodium hydroxide is -57.3 kjmol. use this accepted value to
What is the function of the sodium thiosulfate in studying the kinetics of the hydrogen peroxide-iodide reaction?
A famous foot race in California starts from the bottom of Death Valley (100 m below sea level) and finishes at the top of Mt. Whitney (4300 m above sea level). what percentage does the oxygen number density decrease between the start and the finis..
What is the minimum flow rate of water (? = 0.990 g/mL) required to scrub out 90.0% of the incoming NH3? What is the mole fraction of NH3 in the scrubbed waste gas stream?
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