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What is the mole fraction of ethanol in a solution made from mixing 299 grams of ethanol (C2H5OH) and 360 grams of water? (Round your answer to 2 places after the decimal.)
1) Suggest a reason why the starting material (trans-1,4-diphenyl-2-butene-1,4-dione) should be recrystallized prior to use in the photochemical isomerization of an alkene.
How many moles of a monoprotic acid with a Ka=4.9x10^-6 must be dissolved in 750 ml of H2O to produce a solution with pH=4.50
What is the potassium concentration of a solution formed by combining 50.0 mL of 0.400 M KCl with 50.0 mL of: a) 0.100 M PdCl6, b) 0.800 M PdCl6 , c) water, d) 0.200 M PdCl6 (If The Ksp for K2PdCl6 = 6 x 10^-10)
Ethylene gycol has a density of 1.11g/mL. What is the volume of 30.0 g of ethylene glycol?
A bottle of nail polish remover contains 182 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788mL.
Imagine that you have a 7.00 gas tank and a 3.50 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
A 21.15 g piece of iron and a 25.05 g piece of gold at 100.0 degreesC were dropped into a 720.0 mL of water at 18.45 degreesC.
Combustion reactions are exothermic. The heat of reaction for the combustion of cyclohexane, C6H12, is 936.8 kcal/mol. What is the heat of combustion for cyclohexane in kcal/gram
Determine the pH and the percentage of fully protonated weak acid/base for each of the solutions listed below:
What is the osmotic pressure of a solution made from dissolving 90.0 g of glucose, rm C_6H_{12}O_6, in 650 mL of water at 14.0{^circ}C.
what is the intermediate of the photochemical isomerization of (E,E)-2,4-hexadiene to (Z,E)-2,4-hexadiene ? Draw the structure of this nternediate
draw the complete structure of lysine, including the site of ionization, in: strongly acidic solution, neutral solution, strongly basic solution.
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