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During a severe episode of air pollution, the concentration of lead in the air was observed to be 3.02 mu g; Pb/m^3.
How many Pb atoms would be present in a 0.500 L sample of this air (the approximate lung capacity of a human adult)?
Determine How many mg of a 298 mg sample remains unreacted after twenty three days if 32P decompose by a first-order mechanism, half-life = 14.3 days.
A 12 kg block of ice has a temperature of -10.0 degrees celsius. The pressure is one atmosphere. The block absorbs 4.50 times 10 to the sixth power J of heat. What is the final temperature of the liquid water?
Could you explain why carbonate, specifically sodium carbonate (Na2CO3) would be particularly good at neutralizing these acids and their conjugate bases?
Write the structure of the compound that would result if the adduct were heated too long in the recrystallization solvent (CH3OH)
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals
Explain why a buffer made of equal concentrations of CH3COOH and CH3COO- does not change in pH when a small amount of NaOH (a strong base) is added to the solution. Does the NaOH dissociate into ions when it is added to the solution?
Indium has only two naturally occurring isotopes. The mass of indium-113 is 112.9041 and the mass of indium-115 is 114.9039 .
If 37.0 mL lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.700 g precipitate, what is the molarity of lead(II) ion in the original solution?
Calculate the pH of the final solution after 250 mL of a 0.157 mol dm-3 solution of HCl is added to 500 mL of a 0.103 mol dm-3 solution of NaCN (Ka HCN = 6.2 × 10-10).
An empty beaker has a mass of 42.889 g. 10.00 mL of NaCl solution are placed in the beaker. The mass of the beaker and solutionis 54.129 g.
A 15.0 ml sample of nitric acid solution is titrated with a 0.960 M barium hydroxide until the end point. Based on the titration data, the concentration of nitric acid is determined to be 3.18 M. Calculate the volume in milliliters of barium hydro..
Create an outline of no more than 10 steps describing how you will regenerate the column, load your sample and collect the hydronium ion released.
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