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The light-emitting decay of excited mercury atoms is first-order, with a rate constant of 1.65E6 1/s. A sample contains 5.2E-6 M of excited mercury atoms.
a) Find the time at which the concentration will be 4.5E-7 M.
b) Find the concentration after 2.5E-6 s.
A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml .(a)find the mean volume and deviation from the mean for each and calculate the average deviation from the mean (b) calculate the relative deviation (in %) for this set of data. Relative deviation (%) ..
at high temperatures phosgene cocl2 decomposes to give carbon monoxide co and cl2. in a typical experiment 0.631 g of
You are required to prepare a review-type essay on Electrochemistry. Insert your completed review essay into a soft-bound cover with a clear plastic front.
Calculate the cell potential after the reaction has operated long enough for the [Al3+] to have changed by 0.40 mol/L. (Assume T = 25°C.)
Solution B is made by taking 15.0mL of solution A and diluting it to 100.00 mL. If solution B is found to contain 55.0ppb CU++, 63.546g/mol, what is the concentration of copper in solution A
explain with appropriate illustriation the concept of resonance stabilization of
2) What is the maximum size of airbag (in litres) that can be inflated using 100 g of NaN3 at 25.0 °C and 101 kPa? Assume that all of the chemical reactions that occur during inflation of the airbag are complete.
A vertical force of 7 N (in the negative z direction) is required to hold the deflector in place. Determine the mass (kg) of the deflector. Assume the velocity of the water remains constant.
given the equation aaq 2baq 3caq 2daq. 45.0 ml of 0.050 m a is mixed with 25.0 ml 0.100 m b. at equilibrium the
If the uncertainty in velocity of an electron is 800.0 m/s, what is the minimum uncertainty in its position
Question- The equation given below refers to the reaction of ammonium of ammonium chloride and barium hydroxide octahydrate.
A solution that is 6.5x10^-2 M in potassium propionate (C2H5COOK or KC3H5O2) and 9.0x10^-2 M in propionic acid (C2H5COOH or HC3H5O2)
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