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A sample of an ethanol-water solution has a volume of 54.2cm^3 and a mass of 49.6 g. What is the percentage of ethanol (by mass) in the solution? (Assume that there is no change in volume when the pure compounds are mixed.) The density of ethanol is 0.789g/cm^3 and that of water is .998g/cm^3. Alcoholic beverages are rated in proof, which is a measure of the relative amount of ethanol in the beverage. Pure ethanol is exactly 200 proof. What is the proof of the given ethanol-water solution?
A certain reaction has an activation energy of 27.03 kJ/mol. At what Kelvin temperature will the reaction proceed 3.00 times faster
what is the pH of a Tris buffer (pka 8.1) prepared by adding 20 mL of 1M HCl to 100mL of a solution of 0.3M Tris
acidifying with dilute H2SO4 and titrating with a 0.01804 M KMnO4 solution. 33.15 mL of the permangate solution was needed to reach the end point of the titration. What is the actual molar concentration of the H2O2 solution?
Displays the volume and pH at which equivalence was reached and plots this point on the graph and validates the code by plotting the midpoint using both methods and displaying the volume and pH for both methods in the Command Window.
Carry out the following mathematical operations, and give each result with the correct number of significant figures. (1.05 x10-3)/ (6.135 )
Explain at 700 C Kc=0.534, Compute the number of moles of H2 that are present at equilibrium if a mixture of 0.840 mole of CO as well as 0.840 mole of H2O is heated to 700C in a 30.0 L container
Sucrose is a nonvolatile, non ionizing solute in water. Determine the vapor pressure lowering at 27C of a solution of 75g of sucrose dissolved in 180 g of water.
It would be greatly appreciated if someone can help me out with this question, explaining to me step by step how I can do this. What is the pH of a solution made by adding 8.80 grams of sodium acetate CH3COONa to 450 mL of 0.105 M hydrochloric acid
Predict the distance between Si atoms in solid silicon. How does this compare to the distance between C atoms in diamond, Which has the same structure as solid silicon
What are the products expected to be formed in good yeild in the reaction 2-methyl-1-hexene is treated with a dialkylborane prepared from borane and an optically active sample of alpha-pinene, and then wit basic hydrogen peroxide.
Problem- Write a three dimensional structure of the eclipsed conformation and the staggered conformation of propane (Use plain lines, solid wedges, and dashed wedges).
Explain what is the empirical formula of the compound. Combustion engage reacting with excess O2. Presume that all the carbon ends up in CO2 as well as all the hydrogen ends up in H2O. As well assume that all the nitrogen ends up in the NH3 in the..
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