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Zinc, copper, lead, and mercury ions are toxic to Atlantic salmon at concentrations of 6.42 x 10^(-2)mM, 7.16 x10^(-3)mM, 0.965 mM, and 5.00 x 10^(-2)mM, respectively. What are the corresponding concentrations in milligrams per liter?
You set off from the bottom of the pile in a space craft that can travel at the speed of light (3.00 x 10^8 m/s). How long, in years, will it take you to reach the top of the pile of pennies? Show all work.
a prepare a series of dilutions of cocl2.6h2o in the range of 0.000 to 0.200 mol dm-3. determine the absorbance of the
determine the kinetic energy of the emitted electrons when cesium is exposed to uv rays of frequency 1.3 x 1015 hz?
The pressure on 200 ml of oxygen gas changes from 380 mm hg to 760 mm hg. The temperature does not change. What is the new volume of the oxygen gas?
You need to dissolve CaCl2 in water to make a mixture that is 38.0% calcium chloride by mass. If the total mass of the mixture is 681.2 g, what masses of CaCl2 and water should be used
At what pH will a solution 0.15 M Cu2+ begin to precipitate as Cu(OH)2? The Ksp for Cu(OH)2 is 1.6 × 10-19.
using the heats of vaporization for at 25 44.02 at 100 40.67 calculate the entropy change for the vaporization of
A weak acid (HA) has a pKa of 4.999. If a solution of this acid has a pH of 4.459, what percentage of the acid is not ionized
The equilibrium constant, Kp, for the following reaction is 0.497 at 500 K: PCl5(g) PCl3(g) + Cl2(g) Calculate the equilibrium partial pressures of all species when PCl5(g) is introduced into an evacuated flask at a pressure
The solubility of CaSO4 in pure water at 0oC is 1.13 gram(s) per liter. What is the value of the solubility product.
Calculate the work done in Joules when one mole of an ideal gas, initially at P = 9 atm, T = 298 K is expanded isothermally to P = 1 atm if (a) the expansion proceeds against a onstant external pressure Pext = 1 atm; (b) the external pressure is r..
A 100.0 g sample of water at 90.°C is added to a 500.0 g sample of water at 10.°C. Calculate the final temperature of the water.
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