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Consider two samples of liquid: one mole of water H2O and one mole of ethanol C2H5OH. The density of water is 1.0 g/mL, and the density of ethanol is 0.785 g/mL. Answer each of the following questions by selecting the correct choice.
Which sample has a larger mass?Which sample contains more molecules?Which sample contains more atoms?Which sample contains more oxygen atoms?
Calculate the molarity of urea in a soln prepared by dissolving 16 g of urea (MM= 60.0 g/mol) in 39 g of H20. The density of the soln is 1.3 g/ml.
If a chemical reaction occurs at a rate of 2.25 * 10-2 moles per liter per second at 322 K, what is the rate expressed in moles per liter per minute?
Toluene is a liquid compound similar to benzene. Calculate the mole fraction of Toluene in a solution that contains 112 g Toluene and 221 g Benzene.
130 mL of an HCl solution with pH of 3.90 is added to 200 mL of an HNO3 solution. The resulting solution is 1.40 mL. What was the pH of the original HNO3 solution?
Calculate Q when the solutions are mixed (time zero). Indicate how the reagent concentrations will changes as the reaction proceeds.
In an experiment for measuring water hardness in a water sample, using Atomic Absorption Spectrophotometry, I obtained a value of 173.74 ppm hardness for my water sample.
What solution will have the lowest boiling point?? 0.075 M CaCl2 0.020 M Na3PO4 0.050 M KNO3 0.025 M NH4NO3 0.10 M C6H12C6
A sample of chlorine gas at a pressure of 420 mm Hg and in a volume of 3.50 L was heated from 18.0oC to 45.0oC after being transferred to a container of volume 2.35 L. The pressure in this new container should be about
Transesterification of a certain triglyceride produced one molecule of methyl oleate and two molecules of methyl linoleate. Draw the original triglyceride.
15.0 grams of an unknown sugar was dissolved in water and the final volume of the solution was brought up to 1.00 L. The osmotic pressure of this solution was determined to be 2.44 atm at 25°C. Which of the sugars below was most likely the unknown..
The solution has a density of 1.182 g/ml. What are the molality, molarity and mole fraction of HNO3 in this solution?
A sample of oxygen is collected by water displacement at a temperature of 35C when the barometric pressure is 752 mm Hg. What is the partial pressure of the dry gas?
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