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2750 ml sample of 3 M Hcl solution is treated with 4.66 gm of magnesium . Calculate the concentration of the acid solution after all the metal has reacted. Assume that the volume remain unchanged-------M HCl.
A certain substance has a heat of vaporization of 44.01 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 289 K?
What is the molarity of a solution made by dissolving 8.56 g of sodium acetate in water and diluting to 750mL?the answer is .139, but how
A hypothetical molecule, X-Y, has a dipole moment of 1.90 D and a bond length of 169 pm. Calculate the percent ionic character of this molecule.
What is the molarity of an unknown H2C2O4 solution if 10.0 mL of the H2C2O4 solution required 21.3 mL of 0.025 M KMnO4 solution to obtain
100.0 ml of .100 M acetic Acid is placed in a flask and is titrated with .100 M sodium hydroxide. An Appropriate indicator is used. Ka for acetic acid is 1.7x10^-5. Calculate the pH in the flask at the following points of titration.
Calculate the energy per photon of electromagnetic radiation, for a photon having a frequency of 5.16 X 10^19 Hz (h = 6.626x10^-34 J s):
What was the concentration, in mol/L and mg/L, of Cu^2+ and Zn^2+ in the original solution? If the solution was prepared by dissolution of 0.654 g of brass in 250.00 mL solution, what the percentage of copper and zinc in the original sample of bra..
Consider the following reaction at equilibrium. What effect will increasing the temperature have on the system. Fe3O4(s) + CO(g) 3 FeO(s) + CO2(g) ?H°= +35.9 kJ
limiting Reactant Worksheet - What are the two steps in the Experimental Procedures that are incorporated to reduce the loss of the calcium oxalate precipitate. Identify the steps in the procedure and the reason for each step.
A 4.50 g sample of NaOH at 25°C dissolves in 75.0 mL of water also at 25.0°C. The final equilibrium temperature of the mixture is 40.5°C. What is the enthalpy of solution, ?Hs, of NaOH expressed in kilojoules per mole
effuse through a membrane. How long would it take the same number of moles of Ar(g) to effuse through the same membrane?
Consider equal volumes (say 1 rm L) of a substance in the solid, liquid, and gas phases. Arrange them in order of decreasing mass. If the mass difference between samples is relatively small, rank the items as equivalent.
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