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Calculate the Cation Exchange Capacity (CEC) of 1 g of a soil that releases the following concentrations of ions in the ammonium acetate test (when we used 100 mL of 0.5 M ammonium acetate).
Ca2+ = 30.8 µg/ml
Mg2+ = 8.4 µg/ml
a solution of sodium chloride in water has a vapor pressure of 20.1 torr at 25degc. what is the mole fraction of nacl
A first order chemical reaction has a rate constant of 5.8×104 s-1 at 10 °C and a rate constant of 4.7×105 s-1 at 64 °C. Calculate the activation energy, Ea, for the reaction.
What mass of solution contains each of the following amounts of dissolved solute? 1.) 5.0g of sulfuric acid in a 25.0\% solution 2.) 11.0g of acetic acid in a 5.00\% solution
Quartz, which contains one silicon atom and two oxygen atoms per formula unit, is the second-most-common mineral on Earth after feldspar
Thin-layer chromatograph------Describe how the Rf for a compound will change as the developing solvent is made more polar. What is meant by "developing" a TLC plate. What is meant by "visualization" of a TLC plate
At 1 atm, how much energy is required to heat 55.0g of H2O(s) at -22.0 ^degree C to H2O(g) at 123.0^degree C? Please answer in kJ & explain in detail
What dansylated amino acids would be isolated after reaction of S-F-H-Y-W-C-T-L-C-K-L-I-N-D-S with dansyl chloride an the complete with hydrolysis
Write net Brønsted equations that show the acidic or basic nature of the following substances, given the pH.
What is the coordination number for each of the following complexes? A. [Co(NH3)4(H2O)2]^3+ B. [Cr(EDTA)]^-
when pcl5 solidifies it forms pcl4 cations and pcl6- anions. according to valence bond theory what hybrid orbitals are
what is the pressure in a gas containter that is connected to an open-end manometer if the pressure of the atmosphere is 722 torr and the level of mercury in the connected to the container is 8.60cm
A dry-cleaning solvent (molecular weight = 146.99 g/mol) that contains C, H, and Cl is suspected to be a cancer-causing agent. When a 0.124 g sample was studied by combustion analysis, 0.223 g of CO2 and 0.0301 g of H2O formed. How many moles of e..
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