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A sample containing 42 ml of 0.0625 M NaBr was made by adding 37.8 ml of water to an initial solution of concentrated NaBr. Explain what the concentration of NaBr was in the initial solution
a 0.0050 molar solution of sugar is separated from pure water by a membrane at 20c. what is the osmotic
What is the maximum number of electrons in an atom that can have the following quantum numbers. Explain.
A beaker contains 250 mL of an aqueous solution that has .025 moles of formic acid (HCOOH) and .025 moles of sodium formate (HCOONa)
sodium hydroxide solution for neurtalization to a phenolphthalein end point, calculate the molarity of the phosphoric acid.
a sample of gold with a mass of 197 grams is made up of 6.02 x1023 atoms. what is the mass of just one atom of gold?a.
What pH is needed to precipitate Ni(OH)2 so completely that the nickel concentration is less than 1.1 x 10-5 M (Ksp = 1.6 x 10-14)
give explanation why it is not practical to evaluate the solubility of the two salts ax and by2 by simply comparing the
the gas buret before the hydrogen gas is genterated and is not removed, will the reported percent aluminum in the sample be too high or too low?
What was the percentage by mass of Mg(OH)2 in the original sample. When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g)
The standard Gibbs-free energy of a system is related to its equilibrium constant through the following equation.
dissolved in the same volume of distilled water, how do you expect the conductivities of each solution to compare? Explain your reasoning.
in a 125-ml erlenmeyer flask containing a magnetic stirring bar mix 0.05 mol of benzaldehyde with the theoretical
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