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1. When 4.21 g of a nonelectrolyte solute is dissolved in 165 mL of water at 26 °C, the resulting solution exerts an osmotic pressure of 909 torr. What is the molar concentration of the solution? How many moles of solute are in the solution? What is the molar mass of the solute?
2. Assuming equal concentrations, rank these aq. solutions by their freezing point: Li2SO4, NaNO3, Sn(NO3)4, Na3PO4
Finding Kc from Products' Moles, Volume and Percent Reacted, The following reaction occurs at 1600 deg. C. Calculate the equilibrium constant Kc for the reaction.
The element Na has bcc packing with a body-centered cubic unit cell. The density of sodium is 966 kg/m3. Calculate the volume (m3) of the unit cell of sodium.
50.50 mL of 0.116 M HF is titrated with 0.1200 M NaOH. How many mL of the base are required to reach the equivalence point? (Ka for HF is 6.8 x 10-4)
How many grams of sucrose (C12H22O11) must be added to 509 g of water to give a solution with a vapor pressure 0.723 mmHg less than that of pure water at 20 degrees C.
given 4 NH3(g) + 5 O2(g)4 NO(g) + 6 H2O(g) 1,25g of NH3 reacts with 2,29g of O2 what is the limiting reactant?
Calculate the pH during the titration of 50.00 ml of 0.0500 M NaOH with 0.1000 M CH3CO2H after the addition of the following volumes
What exactly is the reduction of alkynes? I just understand that it is a method for synthesizing alkenes. Why are the leaving groups for E2 reactions not as good as E1 reactions?
A 25.0-mL sample of 1.00 M NH3 is titrated with 0.15 M HCl. What is the pH of the solution after 15.00 mL of acid have been added to the ammonia solution? Kb = 1.8 × 10¯5
what is the pH of a solution prepared by dissolving 4.5 g HCl in water to make 410 mL of solution?
How much energy is released during the complete combustion of 470 grams of cyclobutane
a 4.0 g sample of iron was heated from 0 degrees celsius to 20 degrees celsius. it absorbed 35.2 j of heat. what is the specific heat of this piece of iron?
What volume of 0.1000 M NaOH is required to titrate a 0.1000 M propionic acid solution, CH3CH2COOH, Ka = 1.3 x 10-5 , to the equivalence point?
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