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(a) Calculate the molality of a 20.0 per cent by weight aqueous solution of NH4Cl. (Molecular weight: NH4Cl = 53.5) (b) If this NH4Cl solution is assumed to be ideal and is completely dissociated into ions, calculate the vapor pressure of this solution at 29.0 °C. (The vapor pressure of pure water at 29 °C is 30.0 mm Hg.) (c) Actually a solution of NH4Cl of this concentration is not ideal. Calculate the apparent degree of dissociation of the NH4Cl if the freezing point of this solution is -15.3 °C. (The molal freezing point depression constant for water is 1.86 °C per molal.)
A sample of CO2 gas which weighs 1.62 grams has a volume of 1.02 liters when collected at 20°C. What would be the pressure of the gas sample
Determine the kinds of intermolecular forces that are present in each element or compound.
A 0.9161 g sample which contained monoprotic lactic acid, C3H6O3, was dissolved in 75 mL of water and titrated to the equivalence point with 32.25 mL of a 0.1057 M NaOH solution.
If you know the answer please give units :) Part A: The reactant concentration in a zero-order reaction was 5.00×10^?2M after 140s and 3.00×10^?2M after 300s. What is the rate constant for this reaction? -> For this I got that 1.25x10^-4M/s, whic..
Describe the major organic product(s) of this reaction. CH3C?CD + CH4 or CH3C?CCD or CH3C?CCH3 or CH3C?CD + CH3D or CD3C?CD3
The osmotic pressure of this solution was 0.00178 atm at 25 C. Calculate the molar mass of hemoglobin, which is a molecular compound and a nonelectrolyte
what happens when phenolpropane sodium bromide and sulfuric acid are refluxed, distilled then seperated
how many kilograms does it take to sink a model barge with the following measurements in a calm pool; 300.00 cm * 25.00 cm * 68.00 cm with a mass of 850.0 grams
Aluminum has a specific heat of 0.880 J/g-deg. How many joules are needed to heat 155g of Al from 20.0oC to 75.0oC
which on of the following is the correct formation reaction that properly defines a delta Hf value
For the following reaction KClO3---->KCl+1/2 O2 assign oxidation states to each element on each side of the equation. reactants and products. Which element is oxidized? Which element is reduced
Carbon-14 decays with a half-life of 5730 years. What is the first order rae constant for its decay in units of years^-1
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