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If someone ate 6259 mL of snow (don't ask me why!!!), how much water would they have consumed? How many kJ would be required to bring it to body temperature? (We noted in class that the amount of heat necessary to melt snow is 6.01 kJ/mol)
Calculate the number of carbon atoms in 0.75 L of acetone (CH3COCH3). (density = 1.3 g/mL and boiling point = 48.5 degrees Celsius)
the pH of a saturated solution of a metal hydroxide MOH is 10.85 calculate the Ksp for the compound
By Solving this problem student understand about isotopic abundance and how to calculate atomic weight (average atomic mass) of an element -
calculate the mass of ammonium nitrate that should be heated to obtain 100 mL of dinitrogen oxide, N2O, at 1.00 atm and 25 degrees celcius?
Using the de Broglie wave equation, calculate the speed, in m/s, at which an electron must travel to have a wavelength of 25.0 pm?
If 1.0 mL of vinegar needs 22.5 mL of 0.195 M NaOH to reach the equivalence point in the titration, what is the molarity of the original vinegar solution?
Beryllium was first isolated as a relatively pure metal when investigators heated solid beryllium chloride with solid potassium.
Calculate the gas NH3 in ppm over NH4OH solution.The density of the solution is 0.9g/ml and the Commercial concentrated aqueous ammonia is 29%.
The enthalpy change at 25C and 1 atm for the complete burning of 1 mol of acetone in oxygen to give CO2(g) and H2O(l) is -1791kJ. Calculate the standard enthalpy of formation of acetone.
In analyzing a general unknown containing ions from several of the cation groups, a student treated the decante from Group II with Na3Co(NO2)6 and observed that a precipitate formed.
Choose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate ?Hvap for dichloromethane (in kJ/mol).
Assume that a particular reaction evolves 243 kJ of heat and that 28 kJ of PV work is gained by the system....? 1) What are the values of delta E and delta H for the system? 2) What are the values of delta E and delta H for the surroundings?
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