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A solution is prepared by dissolving 2.33g of C60 in 100.0g of toluene. Given that the vapor pressure of pure toluene is 5.00kPa at 30C what is the vapor pressure of toluene in the solution?
A sample of an unknown biochemical compound is found to have a percent composition of 45.46% carbon, 7.63% hydrogen, 10.60% nitrogen and the balance oxygen. What is the empirical formula for this compound
What is the pH of the solution that results from adding 30mL of 0.015M KOH to 50mL of 0.015M benzoic acid, Ka = 6.3 x 10^-5
The mass of 158 mL of the gas, measured at 556 mmHg and 310 K is found to be 0.275 g. What is the molecular formula of the compond?
Given the following equilibrium constant at 25 C, calculate the equilibrium constant for the unknown reaction below.
Determine what would you use to prepare 10 ml of 0.2M CaCl 2 from the 20M stock solution and find out which solution is with pH > 7, but is not an Arrhenius base in the strict sense?
A 31.0 sample of an unknown H3PO4 solution is tritrated with a 0.120M NaOH solution. The equivalence point is reached when 26.43 mL of NaOH solution is added. What is the concentration of the unknown H3PO4 solution
At 500 K, PCl5 decomposes rather extensively into PCl3 and Cl2. If 1.000 moles of PCl5 is placed in a 1 liter box at 500 K, 13.9 % of it decomposes into PCl3 and Cl2. Calculate K for PCl5(g) PCl3 + Cl2
what is the theoretical and percent yields of ethanol if 648 grams of sucrose undergoes fermentation and 349 grams of ethanol is obtained.
In a particular biological reaction taking place in the body at 37°C, the change in enthalpy was --135 kJ mol--1 and the change in entropy was --136 J K--1 mol--1. (a) Calculate the change in Gibbs energy (b) Is the reaction spontaneous? (c) ..
A 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M LiOH. Determine the pH of the solution before the addition of any LiOH.
How many grams of magnesium metal will react completely with 4.8 liters of 5.0 M HCl?
What time will it take 10.0 mL of Chlorine gas to effuse through a porous barrier when it has been noticed that 76.3 min are needed for 10.0 mL of Hydrochloric acid gas to effuse through the same barrier.
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