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The mass percent of urea (formula CH4N2O) in a solution prepared by dissolving 16g of urea in 39g water is: a). 29% b). 0.29 % c). 16% d). 71%
Solutions of sodium thiosulfate are used to dissolve unexposed AgBr ( Ksp= 5.0E-13) in the developing process for black-and-white film. What mass of AgBr can dissolve in 1.00L of 0.500M Na2S2O3?
What is the PH after .15 mol of NaOH is added to .050 mol of propanic acid and ,080 M of sodium propanoate with a ka of 1.3x10^.5
Ammonia, NH3, is a stronger ligand than Cl- but weaker than CN-. Complete the balanced equations for the reactions that are predicted to occur
Calculate the standard enthalpy of formation of solid diboron trioxide (B2O3) using the following thermochemical information
A volume of 80.0 mL of a 0.520 it M HNO_3 solution is titrated with 0.590 it M KOH. Calculate the volume of KOH required to reach the equivalence point?
Explain why magnetic metals are found only among the 3d and 4f elements. Why are Sc and Ti, which are also 3d elements, diamagnetic?
what mass of cacl2 when dissolved in 100.00 g of water gives an expected freezing point of 5.0degc cacl2 is ionic?
dinitrogen pentoxide decomposes in the gas phase to form nitrogen dioxide and oxygen gas. the reaction is first order
what is the cell potential at 25 ?C if the concentrations are [Co3+]= 0.852M , [Co2+]= 0.545M , and [Cl?]= 0.313M and the pressure of Cl2 is PCl2= 6.10atm
What techniques might you employ to induce crystallization if no crystals have formed after you cool the solution to room temperature.
dissolved in water to produce a 0.0172 M solution. The pH of the resulting solution is 2.34. Calculate the Ka for the acid.
25.00 mL of a tap water sample is titrated with5.00x10-3 M EDTA solution. 6.25 mL are required to reachthe endpoint. What is the hardness of the water in ppm
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