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Suppose hydrogen sulfide is added to a solution that is 0.0010 M in Fe2+, Cd2+, Co2+, and Mn2+ such that the concentration of H2S is 0.10 M. When the pH of the solution is adjusted to 3, a precipitate forms. What is the composition of the precipitate?
a 0.421-g sample of asprin prepared in ther laboratory isdissolved in 95 ethanol diluted with water and titrated to
The half-life of phosphorus-32 is 14.3 days. If you begin with 41.1 mg of this isotope, what mass remains after 42.2 days have passed?
The cell SCE||CdA2(sat'd), A-(0.0250 M)|Cd has a possible of -0.721 V. Compute the solubility product of CdA2.
The average molecular speed in a sample of CH4 gas is 641 m/s at 311 K. The average molecular speed in a sample of He gas is ________ m/s at the same temperature.
Description of amino acids, Chiral compounds occur when a carbon atom has four different things bonded to it. All but the simplest amino acids (glycine) are chiral because the alpha carbon has an amine group
How many grams of water are needed to dissolve 27.8 g of ammonium nitrate (NH4NO3) in order to prepare a 0.452 m solution
The specific heat of iron metal is 0.450 J/g-K. How many J of heat are necessary to raise the temperature of a 1.05-kg block of iron from 25.0 Celcius to 88.5 Celcius
in general decreasing the temperature makes which phase transitions more likely to occur?1. condensation fusion
A solution of NaF is added dropwise to a solution that is 0.0173M in Ba2+. While the concentration of F- exceeds M. BaF2 will precipitate. Ignore volume changes for BaF2, Ksp=1.7*10-6
Calculate the number of kilograms of helium required to inflate a balloon with a volume of 100.000 L at a pression of 250 mmHg and atmospheric temperature of -35 ° C.
Calcium fluoride is added to water until the solution is saturated. The calcium ion concentration in the saturated solution is 2.1 x 10-4 M. Compute the equilibrium constant for the dissolution of calcium fluoride.
Suppose you analyze a sample of fertilizer by the procedure of this experiment and obtain 1.000g of MgNH4PO4 * 6H20. Calculate the equivalent mass of P2O5 initially in the sample.
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