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Can some explain clearly how to determine the valence electrons of transitional metals and also their ions. for ex Mo, Mo2+, Ag, Pb. Pb2+. Confuse about what makes up their outer shell.
A 29.0-g sample of water at 260. K is mixed with 48.0 g water at 300. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Find the fraction of association of 0.100 molar solution of Hydrazoic Acid. Ka = 2.20x 10^-5.
A 530. g piece of copper tubing is heated to 92.0°C and placed in an insulated vessel containing 49.5 g of water at 39.5°C. Assuming no loss of water and heat capacity for the vessel of 10.0 J/K,
Sample were collected in a zinc smelter to determine the exposure of a furnace tender to lead fume during his normal work duties which involves "furnace draws" and general activities around the furnace.
Calculate the concentrations of all species at equilibrium for the following case.
If the concentration of fluoride in fluoridated drinking water is 1 x 10 ^-5 M and the calcium ion concentration in blood is 2.5 x 10^ -3 M, why is there no danger of CaF2 precipitating in the blood stream, after drinking the water?
Calculate the equilibrium constant Kp for synthesis of HCl at 298 H2+Cl2------>2HCl
A student is given a soluble sodium salt containing one of eight possible anions (negative ions): acetate, chloride, bromide, iodide, sulfide, sulfate, or phosphate. the student adds some BaCl2 solution to the salt solution.
A 93 gram solution of silver nitrate contains 16 grams of AgNO3. What is the percent by mass of silver nitrate in this solution?
The precipitation of aluminum hydroxide, Al(OH)_3 (K_sp)=1.3 x 10^{-33}), is sometimes used to purify water. At what pH will precipitation of Al(OH)_3 begin if 5.70 lb of aluminum sulfate, Al_2(SO_4)_3, is added to 2050 gallons of water (with a ne..
A star is estimated to have a mass of 1 1036 kg. Assuming it to be a sphere of average radius 7.0 105 km, calculate the average density of the star in units of grams per cubic centimeter.
consider the ring structure of beta-D-glucose. it will give a positive test as a reducing sugar. How can that happen
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