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Explain how the electronic properties of an attached group can affect the rate of electrophilic aromatic substitution and the orientation.
aloh3 3hcl ---gt alcl3 3h2odetermine the moles of acid neutralized if a tablet contains 0.200 mol
A piece of metal with a mass of 146 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 35 mL. What is the density of the metal?
Describe why barium must be disposed of properly. What are the health effects of excess barium in drinking water? What is the maximum allowable concentration of barium in public water systems?
A first order reaction has an Arrhenius constant for the reaction is 9.4 x 1010 sec ^-1, and an activation energy of 64.4 kJ. At what temperature (in Celsius) is the rate constant equal to 0.472 sec^-1
The endpoint of a titration is not exactly the same as an equivalence point. Why does the titration still work to use the endpoint
a helium balloon is held at 1.2 atm of pressure and 300 K. If the pressure on the balloon increases to 4.2 atm, to what temperature must the balloon be heated , to maintain its same volume?
What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear? given 90.5KJ/mol
What difference is there in change of pH with volume of NaOH added near the equivalence point as compared to a point earlier in the titration
A sample of MgCl2 is known to be contaminated with NaCl. A 3.47-g portion of the sample is dissolved in water and treated with an excess of AgNO3 solution.
Write reactions and equilibrium relationships for the first four complexes formed between cadium(II) and chloride
Suppose you are measuring the mass of a sample using a balance that employs a standard mass of density dw = 8.0 g/mL. a) What is the buoyancy correction (m/m\'), if the sample density is less than 8.0 g/mL?
Volume of acid (HCl) used= 14.1 mL ;Volume of base (NaOH) used= 22.4 mL; Molarity of standard base (NaOH)= 0.20 M What is the molarity of the acid solution?
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