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If density of ethanol is 0.789 g/ml what is the concentration of 5 grams benzene (c6h6) dissolved into 50 grams ethanol (c2h5oh)?
A chemist burns 160 g of aluminum in oxygen to produce aluminum oxide. She produces 260 g of aluminum oxide. Write a balanced equation and calculate the theoretical yield and percent yield.
Benzyl alcohol, although a primary alcohol, reacts very rapidly in the presence of HCl forming benzyl chloride. Why. The phenyl ring increases the acidity of the -OH group.
Write the mathematical equation to be used in determining the enthalpy change and explain each term in the equation.
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)
a solution of ethanol c2h5oh in water is prepared by dissolving 60.0 ml of ethanol density 0.79 gcm3 in enough water
How many seconds would it take to deposit 0.500 g of Ni metal on an electrode by passing a 3.00 amp current through a solution of Ni2+
calculate the molecular mass of the nonionic solutes. 8.02 grams of solute in 8.61 grams of water lower the freezing point to -0.430 degress celcius.
a sample of 11.0 grams of cacl2 is dissolved in 125 grams of h2o with both substances at twenty five degree celsius.
insulin is a protein that is used by the body to regulate both carbohydrate and fat metabolism. A bottle contains 475 of insulin at a concentration of 30.0 . What is the total mass of insulin in the bottle?
Which of the following metals will be oxidized by Pb(NO3)2: Zn, Cu, Fe? Write the balanced molecular, ionic and net ionic equations for the reaction.
Naturally occurring cobalt consists of only one isotope, ^59Co, whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt, ^60Co, relative atomic mass 59.9338, is used in radiation therapy for cancer.
Draw the molecular orbital diagram for the acetylide anion (C22-). Assume that order of the n=2 molecular orbitals in increasing energy is
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