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The Ka of a monoprotic weak acid is 4.95 × 10-3. What is the percent ionization of a 0.171 M solution of this acid?
Its undissociated form is red and its anionic form is yellow. What color would a methyl red solution have at pH = 7.0 ? Show your calculations. Hint: Determine the concentration ratio of methyl red and its conjugate.
strong/weak and concentrated/dilute. Provide an appropriate example using each of these terms to describe a solution
what is the molarity of a solution when 2.25g NaF is dissolved in enough water to make 250mL of solution
Moneybags was found dead on the floor of his study. Investigators found an open bottle of scotch on his desk, and a broken glass on the floor near his body
A laser pulse with wavelength 555 contains 4.40 of energy. How many photons are in the laser pulse?
Calculate the molality, molarity and mol fraction of a 25.4% (by mass) aqueous solution of phosphoric acid (H3PO4). in one litre of solution.
A voltaic cell consists of a Mn/Mn2+ electrode (E°= -1.18 V) and a Fe/Fe2+ electrode (E°= -0.44 V). Calculate [Fe2+] if [Mn2+] = 0.050 M and Ecell = 0.78 V at 25°C.
The activation energy of a certain reaction is 45.3kJ/mol . At 24{~}^{\circ}\rm C , the rate constant is 0.0160s^{-1} . At what temperature in degrees Celsius would this reaction go twice as fast?
5000 joules of energy are added to 108 grams of silver, Ag, at 20°C. What is the final temperature of the metal? (the specific heat of silver is 0.235)
Aluminum and oxygen react according to the following equation: 4 Al (s) + 3 O2 (g) → 2 Al2O3 (s) What mass of Al2O3, in grams, can be made by reacting 4.6 g Al with excess oxygen
how many grams of HNO3 must be dissolved to make 25L of a solution that has a pH of 1.5
Arrange the elements in order of decreasing ionization energy N MG O F Al
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