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A flask is filled with vapor by boiling a volatile unknown liquid in the foil covered flask. As it boils away, the vapor of the unknown pushes the air out of the flask through a tiny pinhole opening and eventually the flask is filled with an atmosphere composed exclusively of the unknown. When the flask is allowed to cool, the vapor condenses and air again refills the flask.
Q: If a drop of water clings to the outside of the foil cap and is not removed, how would the experimentally determined molecular weight be affected?? too high or too low?? explain.
Calculate the molarity of a solution of glycerol made by dissolving 63.000 glycerol at 15 in enough water to make 300.00 of solution.
what will be the theoretical yield of bromobenzene in given reaction as C6H6 + Br2 → C6H5Br + HBr also find out percentage yield when actual yield of bromobenzene was found 56.7 g?
The experiment done was the synthesis of p-chlorophenoxyacetic acid. I have lab questions that I am unsure how to do. Please help. 1. How many moles of p-chlorophenoxyacetic acid should form in this reaction?
Assume a density of 1.08g/mL for the solution. A)Find molarity of solution B)Find molality of solution C)Calculate mass percent of solution
Write the expression for the equilibrium constant. b. Which way would the reaction shift in each of the following cases?
How many liters of liquid nitrogen are produced when 982.0 L of nitrogen gas is liquefied at 77.36K?
a helium balloon is held at 1.2 atm of pressure and 300 K. If the pressure on the balloon increases to 4.2 atm, to what temperature must the balloon be heated , to maintain its same volume?
a colorless liquid that is commonly known as grain alcohol, is 0.789 g/mL. Calculate the mass of 17.4 mL of the liquid.
A particular brand of gasoline has a density of 0.737 at 25C . How many grams of this gasoline would fill a 13.3 tank?
Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17%, and Rb-87 with mass 86.9092 amu and a natural abundance of 27.83%.
Octane has a vapor pressure of 40. torr at 45.1 degrees celcius and 400. torr at 104.0 degrees celcius. What is its heat of vaporization (R=8.214 J/K mol)
Concentration of NADH was found by using beer's law using 6.22 mM cm-1 as extinction coefficient. Concentration of NADH = .0212 mM. Moles of NADH that are present in 1.02 mL sample was found by : .0212 mM x 1.02 mL = .021624 mM/mL
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