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An oxide of phosphorus is 43.7% P, is 56.3% O, and has a molecular weight of 284 g. What is its molecular formula?
The Ka values for nitrous acid HNO_2 and hypochlorous HClO) acid are 4.5 10^{-4} and 3.0 10^{-8}, respectively. Which one would be more suitable for use in a solution buffered at pH = 7.0?
What is its solubility under atmospheric conditions? (The partial pressure of CO2 in air is 0.00055 atm.) Assume that CO2 obeys Henry's law.
If the surface area of a human body is 16,100 square centimeters, what is the total weight of the atmosphere on a human body
At equilibrium the total pressure was 1.00 atm and the NOCl prssure was 0.27 atm. 2NOCl(g) &hArr 2NO(g) + Cl2(g) Calculate the partial pressure of NO and Cl2 in the system
Covert the EU Nitrate standard of 50ppm to its nitrogen content alone. Is the EU standard more or less stringent than the United States regulatory limit
Write the balanced molecular, ionic and net ionic equations for the reaction between magnesium and cobalt(II) sulfate. (b) What is oxidized and what is reduced in the reaction?
Calculate the concentration of a solution of FeCl3 was prepared by dissolving 13.86 gm of FeCl3 in 2.5L of water.
A 25.0 mL sample of a solution of the weak base aniline, C6H5NH2, requires 25.67 mL of 0.175 M HCl to reach the equivalence point. (Kb for aniline = 4.0 x 10-10)
a 0.5118 gram sample of caco3 is dissolved in 6 moles of hcl and the resulting solution is diluted to 250.0 ml in a
The 13C nucleus is a spin 1/2 particle, which means it can orient in two directions in a magnetic field (with the field and against it). The difference in energy between the two orientations is given by:
Pick any two normalized eigenfunctions of the particle in the box Hamiltonian. Show by direct integration that these functions are orthogonal functions.
A solution contains 0.040 mole of Ba(OH)2 completely dissolved in water to give 400 mL of solution. What is the ion concentration for this solution.
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