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How many grams of boric acid, B(OH)3 should be used to make 2L of 0.05M solution? What kind of flask would be used to prepare this solution?
Solutions A and B are separated by a semipermeable membrane that is permeable to K+, but not Cl-. Initially, Solution A is 0.5 L of 100 mM KCl, and Solution B is 0.5 L of 1 mM KCl.
mercury has a density of 13.6 g per ml. a barometer holding 9.50 ml of mercury has broken. the cost of mercury disposal
It is possible to draw a valid Lewis structure that follows the octet rule for all of the following except one. Which one cannot be drawn without violating the octet rule
Determine the concentration of hemoglobin solution knowing that its absorbance is 0.65. The pathlength is 1 cm and the extinction coefficient is 3.9 x 105 M-1cm-1.
Given that the enthalpy of vaporization for water at its normal boiling point is 40.69 kJ/mol, calculate q, w, and delta U for vaporizing 5.00 mol at 100 degrees C in an open container at 1.00 atm.
Explain what health risks may arise people use this hot water in the preparation and cooking and what is the equilibrium constant for this reaction
Calculate a lattice energy for CaH2(s) in kilojoules per mole using the following information: (a) Eea for H(g) = -72.8kj/mol. (b) Ei1 for Ca(g) = +589.8kJ/mol.
what is the density in gml of a sphere with a diameter of 4cm and a mass of 1.35 grams? what is the percent error if
Given the following partial pressure for the gases: Pnz=0.78atm Po2=0.19atm Ptrace=0.05atm Determine the total pressure for the mixture.
A mixture consisting of 30ml of waste and 270ml of seeded dilution water has an initial DO of 8.55mg/l; after 5 day, it has a final DO of 2.40 mg/l. Another bottle containing just the seeded dilution water has an initial DO of 8.75 mg/l
How many grams of the K2C2O4XH2O in the salt mixture remain unreacted (in excess). What is the percent by mass of each salt in the mixture
Even if two spots have the same Rf value, we cannot be certain that the two samples are identical compounds. suggest a good method to confirm that the two samples are the same or not the same.
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