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A chemist dissolves 75 g of acetic acid in enough water to prepare two litres of solution. a) What is the concentration of H3O+ ions? b) What is the concentration of the acetate ion (the conjugate base)?c) What is the pOH of the solution?  Ka of acetic acid = 1.8 x 10-5 You may use the desmos online calculator M = mol/L                                           mass = moles x molar mass pH = -log[H+]                                                 [H+] = 10-pH pOH = -log[OH-]                                                 [OH-] = 10-pOH  

In Trisomy 21, nuchal fold translucency is:

For the following reaction; 2A + B + 2C –> D + E [A] = 0.85M , [B] = 0.4M, [C] = 0.3M A is second order, B and C are first order. In order for the rate of the reaction to be 2.75 M/s, what would the rate constant have to be? You may use the desmos online calculator rate=k[A]a[B]b…

a) What is the electron configuration for a vanadium ion with a +3 charge? b) How many electrons can be found in the following?  Explain how you know.                          i) the third energy level (n=3) ii) a “p” shaped orbital   1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p67s25f146d107p6

a) Using examples, compare transverse and longitudinal waves. b) What is the difference between a waves frequency and it’s period?

a) what is a free body diagram and how can you use it to solve for the acceleration of an object? b) Describe a situation where you would apply Newton’s third law of motion to complete a free body diagram.

On a day that is 18 degrees Celsius, solve for the frequency and wavelength of the 3rd and 4th harmonic,  created on a string that is 1.75 m long. Desmos online calculator

a) if an object has an initial velocity of 2.6 m/s [East] and accelerates at 1.5 m/s2 [West] for 8 seconds, solve for it’s final velocity and displacement b) if an object is dropped from a window that is 72m above the ground, how long will it take to reach the ground and how fast will it be moving the instant before it hit the ground? Desmos online calculator

a) describe the energy transformation principles that we use when we use the conservation of mechanical energy formula. b) if a 2.5 kg mass falls from a 50m high window with an initial velocity of 1.5 m/s [down], use conservation of mechanical energy to solve for i) the total mechanical energy in the system. ii) the speed of the object when is has fallen to a height of 30m Desmos online calculator

Compare the usage of renewable and non renewable resources for energy production in Canada.