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Calculate the pH of a solution that is .210M in nitrous acid and .290M in potassium nitrite. The acid dissociation constant of nitrous is 4.50X10^-4.
predict the atomic radius for selenium se given the atomic radius of sulfur s 0.104 nm and tellurium te 0.143
A student placed 11.5 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mark on the neck of the flask was reached. The flask was then shaken until the ..
the rate constant for a certain reaction is 3.40times10-3 . if the initial reactant concentration was 0.750 what will
An alkaline earth metal, M, combines with a halide, X. Will the resulting compound be ionic or covanlent. Why. What is the Lewis structure for the compound
Once the solvent front reaches the top of the chromatographic paper,solvent begins to evaporate from the top edge of the paper, and the remaining solvent continues to move up the paper.
After adding the two portions into the calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed portions of water to be 45*C. what is the heat capacity of the calorimeter?
How many molecules (not moles) of NH3 are produced from 2.73×10?4 of H2 ? Express your answer numerically as the number of molecules.
What ions and/or molecules are present in relatively large proportions in a solution of the soluble ionic compound KCl (aq)?
Identify the limiting and excess reactions and how many grams of the excess will be unused.
What is the density of an object with a weight of 32 grams if it has a volume of 4 cubic centimeters
What is the heat of the reaction which forms 1.00 mole of gaseous monatomic bromine from 0.500 mole gaseous diatomic bromine
Use the Henderson-Hasselbalch equation to calculate the pH of a 250 mL solution of 0.3 M acetic acid (pKa = 4.76; assume it is initially fully protonated)
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