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If the ozone molecules in the upper atmosphere stratosphere absorb much of the UV radiation from the sun. The temperature of the stratosphere is -23.0 ºC, as well as the pressure due to the zone is 1.4 x10-7 atm. Compute the number of ozone molecules present in 1.00 m3 (1L = 10-3 m3) in the stratosphere.
Calculate the amount of heat required to completely sublime 19.0 g of solid dry ice CO2 at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.
The four unit separation train shown in figure 1.1 has been designed to separate 1000 gmol/hr of a hydrocarbon feed containing 20% CH4, 25 % C2H6
calculate the minimum number of grams of propane that must be combusted to provide the energy necessary to convert
How much limestone must be decomposed by heating to produce 150.0 grams of lime, CaO?assuming that the limestone contains 85.0% pure CaCO3.
I understand the rules for significant figures with multiplication/division, and adding/subtracting. But I am unsure of what to do when there is both multiplication and/or division, and adding and/or subtracting in the same question?
A student in lab has 3.00 g of pure N2 in 0.541 g pure H2. The reaction happens following this equation: N2(g) + 3H2(g) → 2NH3(g) How many grams of NH3 would be produced?
The specific heat of calcium metal is 0.653J/gK. How much heat, in joules, is required to heat a 58.5 gram sample of calcium from -5.2oC to 16.7oC. Enter your answer in scientific notation with no units.
The single proton that forms the nucleus of the hydrogen atom has a radius of approximately. The hydrogen atom itself has a radius of approximately 52.9 .What fraction of the space within the atom is occupied by the nucleus
A current of 3.65 A is passed through a Fe(NO3)2 solution for 1.40 hours. How much iron is plated out of the solution
Calculate the pH of a solution made by dissolving 2.89 g of sodium fluoride and 17.1 mL of 0.309 M hydrofluoric acid in enough water to make 177 mL of solution.
The central atom has 4 electron domains. d) The central atom has 5 electron domains. e) The central atom has 2 electron domains.
It is found that 6.25e-06 g of Cd3(PO4)2 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Cd3(PO4)2.
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