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indicate whether aqueous solutions of each of the following solutes will contain only ions, only molecules, or mostly molecules and a few ions: a) NH4Cl, a strong electrolyte. b)ethanol, CH3-CH2-OH, a nonelectrolyte. c)HCN, hydrocyanic acid, a weak electrolyte.
The rate constant for a reaction is 1.6 x 10^-2 s^-1 at 680k and 4.6 x 10^-2 s^-1 at 890 K. What is the activation energy?
What is the empirical formula of lysine? If the approximate MM of lysine is 150 g/mol, what is the molecular formula?
A student measures 0.2452 g of a monoprotic solid acid, and dissolves the solid in water to make 100.0 mL of solution. The entire solution is titrated to a phenolphthalein endpoint with 45.09 mL of 0.1752 M KOH.
determine how many grams of CaH 2 are required to generate 145 Litres of hydrogen gas if the pressure of hydrogen is 825 mm Hg at temperature of twenty one degree Celsius? .
methane flowing at 2 mol/min is adiabatically compressed from 300 K and 1 bar to 10 bar. What is the minimum work required? Use Departure Functions.
would that be the same kind of functional group linking monosaccharides in long chain polysaccharides
Describe and explain the possible effect on your results of the following experimental errors or variations. (a) You stopped the steam distillation after collecting 3 mL of distillate
A 4.70 g nugget of pure gold absorbed 278 J of heat. The initial temperature was 28.0°C. What was the final temperature.
calculate the change in ph when 6 ml of 0.1 M HCl is added to 100 ml of a buffer solution that is 0.1 M in NH3 and 0.1 M in NH4Cl. And calculate the change in PH
To what volume should you dilute 130. mL of an 7.11 M CuCl2 solution so that 65.0 mL of the diluted solution contains 4.24 g CuCl2?
What is the osmotic pressure of a homogenous solution at the temperature At 25 o C, as this solution is consisting of 21.0 g urea
14 g of Si reacts with 16 g of O to produce SiO2, the only product, with no reactant left over. How much SiO2 would be produced from 34 g of Si and excess O?
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