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How long would a Hydrogen atom take to travel from the center of the Sun to the Earth if it could escape the Sun and if no energy losses occurred during the journey?
a family heats their house with propane gas. the gas companyreports that for an average home it takes 41.589 kj of heat
Draw an example of the change in molar volume during a 1st and 2nd order phase transition vs. temperature.
The following substances dissolve when added to water. Classify the substances according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution.
In carrying out the ?rst standardization in this experiment, a student used 0.5899 g of potassium hydrogen phthalate (KHP) and 24.81 mL of a NaOH solution
It was determined in an experiment that a balloon filled with O2 gas with mass 32.0g in a 1.0 dm^3 volume exerts 21.6 atm of pressure at 0 degrees Celsius. Does Oxygen act like a perfect gas
Calculate the pH at the equivalence point for the titration of 0.10 M NH3 by 0.10 M perchloric acid. pKb for NH3=4.74; hint: consider the change in volume before and after reaction. Complete calculation is required.
The complete combustion of pentane releases 243 kj on the basis of this information calculate the value of delta H for the complete combustion of one mole of pentane
A 2.39-mg sample of safrole was dissolved in 103.0 mg of diphenyl ether. The solution had a melting point of 25.70 C. Calculate the molecular mass of safrole. The freezing point of pure diphenyl ether is 26.84 C, and the freezing-point depression ..
a constant external pressure of 2.85 atm from 3.12 L to 11.85 L. Calculate the values of q, w, delta H, delta S system, delta S surroundings, delta S universe and delta G.
A clinic took temperature readings of 250 flu patients over a weekend and discovered the temperature distribution to be Gaussian, with a mean of 101.00°F
The gas and the liquid have specific heats of 117.2 J/mol K and 72.3 J/mol K. How much heat is evolved when 20.0 g of CCl2F2 is cooled from +40 C to -40 C?
A sample consisting of various gases contains 3.1 X 10^-6 mole fraction of radon. This gas at a total pressure of 31atm is shaken with water at 30 degree celcius.
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