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Q. Calculate the pH and concentrations of CH3NH2 and CH3NH3+ in a 0.0329 M methylamine (CH3NH2) solution. The Kb of CH3NH2 = 4.47 x 10-4. pH= [CH3NH2] = [CH3NH3+] =

Solved • Feb 10, 2019

Q. A certain reaction has an activation energy of 36.05 kJ/mol. At what Kelvin temperature will the reaction proceed 5.50 times faster than it did at 359 K?

Solved • Feb 10, 2019

Q. What is the energy in joules of a 3.82 mole of photons associated with visible light of wavelength 486 nm.

Solved • Feb 10, 2019

Q. How many ions Na in .15mg NaCl

Solved • Feb 10, 2019

Q. Suppose that, from measurements in a microscope, you determine that a certain layer of graphene covers an area of 2.90μm2. Convert this to square meters.

Solved • Feb 9, 2019

Q. (b) The recommended adult dose of Elixophyllin®, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 150-lb person.

Solved • Feb 9, 2019

Q. the rate constant is 7.5 × 10−3 M−1 s−1. If the initial concentration of A is 0.62 M, what will be the concentration of A (in M) at t = 10.6 s

Solved • Feb 8, 2019