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Problem- Estimate the weight load on a roof on lbs/ft^2 for 60 inches of snow. 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^2)
Give your answer with short explanation
The boiling point of another member of this homologous series was found to be 309 rm K. What is the likely molecular formula for this compound?
Calculate the PH of a solution prepared by mixing 45.0 mL 0f 1.45 M sodium hydroxide with 56.0 mL of 0.354 M sulfuric acid.
for a voltaic cell involving pb as the anode and ag as the cathode what would be the initial voltage of the cell if the
A student prepeares a cold pack by dissolving 30 grams of ammonium nitrate in 100 g of water at 20 degrees celcius to 0 degrees celcius, what is the calculated experimental value for ΔH per mole of ammonium nitrate
Find Delta Erxn for the combustion of naphthalene. The heat capacity of the calorimeter, determined in separate experiment, is 5.11 kJ/ C
a student weighs an aspirin tablet and finds that it weighs 385 mg. she crushes it dissolves it and titrates it with
From the following Information, calculate the standard change of enthalpy for the combustion of coal. Compound DeltaHf (kj/mol)
Calculate the expected pH of a solution at the equivalence point using [NaOH] = 0.0997M and [acetic acid] = 0.1048M. The Ka for acetic acid is 1.8 x 10-5
Why does the addition of the NO2+ to the acidic solution of acetanilide need to be performed at a cold temperature. What products would form if the temperature is not kept cold.
When X-rays with ? = 1.937 Å are used, the second-order Bragg reflection from a set of parallel planes in a(n) cesium crystal is observed at an angle
A certain radiation has a wavelength of 474 nm. What is the energy, in joules, of (a) one photon
Ben Franklin dropped the oil on the surface of a lake and found that 2 mL of oil gave a circle of radius 30 m. Estimate the volumetric size of an oil molecule in angstroms, give one significant digit.
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