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n-Pentane, C5H12, boils at 36.1C. what is the molar heat of vaporization in kilojoules per mole if its vapor pressure at 20C is 540 torr?
When 0.5000L of a 1.00M solution of Pb(NO3)2 is mixed with and excess of 1.00M solution of KI how many grams fo lead(II) iodide are formed
A zero-order reaction has a constant rate of 1.00×10-4 . If after 80.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration.
What concentration of aqueous NaCl solution freezes at -15.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.
What wavelength of light would you report in units of nm, if the light had a wavelength of 7.60 x 10-10 m?
how many grams of co2 are generated when 98.5 grams of aluminum oxide form, according to the equation al2(co3)3=>al203+3co2
How many grams of methane [CH4(g)] must be combusted to heat 1.00 kg of water from 25.0°C to 90.0°C, assuming H2O(l) as a product and 100% efficiency in heat transfer?
The vapor pressure of dichloromethane,CH_2Cl_2, at 0 degrees C is 134 mmHg. The normal boiling point of dichloromethane is 40. degrees C. Calculate its molar heat of vaporization.
How are conditions of pressure and temperature, at which two phases coexist in equilibrium, shown on a phase diagram? By a line separating the phases by the endpoints of the line segment separating the phases
12.5 g of KCl (MM = 74.55 g/mol) is dissolved in enough water to make 675 mL of solution. Calculate the molarity of the KCl solution.
Glycerine (glycerol) CH2-OHCH2-OH has a greater resistance to flow (viscosity = 94) than ethanol CH3CH2OH (viscosity = 1.08)
N2 + 3H2 -> 2NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
An effective treatment for some cancerous tumors involve irradiation with "fast" neutrons. The neutrons from one treatment source have an average velocity of 3.3 x 10^7 m/s
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