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A solution of ethanol (C2H5OH) in water is prepared by dissolving 63.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 255.0 mL of solution. What is the molarity of the ethanol in this solution?
how might you be able to build a buffer solution of a given molarity at any pH without doing a single Henderson- Hasselbalch calculation?
Consider the following reaction, where X represents and unknown element. 6X(s) + 2B2O3(s0 = B4X3(s) + 3XO2(g) If 165 grams of X reacts completely with diboron trioxide to rproduce 2.29 mol of B4X3.
five grams of the specified pure solvent is placed is placed in a variable volume piston. What are the molar enthalpy and total enthalpy of the pure system when 50% and 75% have been evaporated at
Draw the electron dot formula for each of the following molecules or ions: a) H2O; b) CCl4; c) H3O^+; d) SiF4; e) CF2Cl2; f) C2H6 HH
Treatment of 1-butanol with phosphoric acid (H3PO4) mixed with sodium chloride should result in the formation of 1-chlorobutane. write the mechanism for this reaction.
The pH of an aqueous solution containing only a monoprotic weak acid has a pH of 4.1. What is the concentration of hydronium ion, H3O+, in the solution? (a)2 x 10?3 M (b)2 x 10?4 M (c)8 x 10?4 M (d)8 x 10?5 M (e)0.61 M
969 ml of gas was collected at 64 degrees celcius and a pressure of 723 mm Hg. Find the volume at STP.
How many grams of sulfur are required to produce 768 grams of sulfur dioxide in the following reaction: S + O2 --> SO2?
Cyclopropane has significantly less angle strain than cyclopropane, yet is only slightly lower in energy. How can this be true? How does this information relate to the fact that cyclobutane is not a planar molecule
Calculate the wavelength () of the light in nanometers () corresponding to the energy change () value of this transition. You can use the following values for your calculations
Write a paper on an article and it shows many different compounds and need a better understanding of where each originated and what steps were made in their synthesis.
change in enthalpy at 25 C and 1 atm for the reaction of 5.00 mol of elemental iron with excess oxygen gas?
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