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How much energy in joules does it take to raise 25.0g of liquid ethanol at 25.0°C to 78.0°C and then evaporate? Ethanol has a latent heat of fusion of 109 J/g and a latent heat of vaporization of 838 J/g. Ethanol also has a specific heat capacity of 2.44 J/gºC.
How many grams of NH3 can be produced from the reaction of 28 grams of N2 and 25 g of H2
Write structural formulas for six, recognizing that the molecular formula may be twice the empirical formula in some of them.
A coin dealer, offered a rare silver coin, suspected that it might be a counterfeit nickel copy. The dealer heated the coin, which weighed 18.0 g to 100°C in boiling water and then dropped the hot coin into 26.5 g of water at T = 16.5°C
Protein Quantification :why did you choose one standard curve over the other for analysis of your unknown?
Sketch a cube. How many vertices does it have? How many edges? How many faces? Mark four vertices of the cube that are also vertices of a regular tetrahedron.
Calculate the amount of N2 gas released (in liters at 37oC and 1 atm) when the diver returns to the surface of the water, where the partial pressure of N2 is 0.80 atm.
Determine the ion notation for an atom with 18 electrons and 20 protons
Show step-by-step mechanisms to produce the indicated polymeric substrate products. include an appropriate termination step where needed.
calculate the energy absorbed when 2.67 moles of ethyl ether undergo combustion: CH3CH2OCH2CH3(l) + 6O2(g)-> 4CO2(g)+5H2O(l) delta H=+1604 kJ/mol
determine how many grams are there in 4.510 22 molecules of barium nitrate?using a sample of gas of 23.6 grams that
Calculate the amount of water that must be supplied to a heat exchanger that cools 100 kg/hr of tomato paste from 90C to 20C. The water enters the heat exchanger at a temperature of 8oC
What are the two steps in the Experimental Procedures that are incorporated to reduce the loss of the lead (2) iodide precipitate. Identify the steps in the procedure and the reason for each step.
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