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15.0 mL of 0.50 M HCl is added to a 100.-mL sample of 0.496 M HNO2 (Ka for HNO2 = 4.0 × 10-4). What is the equilibrium concentration of NO2- ions?
A. 2.6 × 10-3 MB. 1.7 × 10-4 MC. 4.3 × 10-1 MD. 5.1 × 10-2 ME. none of these
calculate the milliliters of 0.124 M KOH required to neutralize 46.0 mL of 0.200 M HNO2-?
A physiological saline solution contains 154 mEq/L each of Na+ and Cl-. How many moles of Na+ are in 1.00L of the saline solution?
An sulphuric acid solution has a concentration 3.75 M and a density of 1.230 g/cm3. Determine the molality of the solution.
the reaction that would occur between HCL and NaHCO3 using curved arrow notation. Show all nonbonded electrons.
A sample of an ore of iron, hematite, is 56% Fe2O3. How much iron is there in 2 kilograms of the ore?
A sample of air contains 0.130 ug/L SO2. Given that the density of the air sample is 1.19 g/L, calculate the SO2 content in parts per million by weight.
which of the following shows the acids in order from strongest to weakest? The order of atomic radii is I > Br > Cl
A perfectly square piece of gold foil measuring 3.3 mm on an edge is isolated from a bottle of liqueur
Calculate the molarity of a solution made by dissolving 0.650 grams of Na2SO4 in enough water to form exactly 880 mL of solution.
A 0.0100 molal aqueous solution of a weak acid freezes at -0.0219 oC. Calculate the percent ionization of the weak acid, HA.
At room temperature, the equilibrium constant, Keq is approximately 3. Calculate the number of moles of reactants and products expected in the equilibrium mixture of this reaction
what would the magnitude of q need to be to give the experimental dipole moment? Express your answer as q divided by the proton charge. In other words, what fraction of a full proton charge is the charge magnitude of the ion pair?
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