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A sample of magnesium sulfate heptahydrate having a mass of 7.35 g. is dried completely. How many grams of dry product are expected to be found?
Calculate the pH at the equivalence point in a titration 45.7 mL of 0.17 M chloropropionic acid with 0.4 M KOH.
how many ml of concentration sulfuric acid, 94%(g/100g solution), density 1.831 g/cm3 are required to prepare 1L of 0.100 M solution.
because the electronegative chlorine atom pulls electrons away from the O-H bond and thus weakens it. Calculate the hydronium-ion concentration and the pH of a 0.0022 M solution of chloroacetic acid. Ka is 1.3 10-3.
The double-replacement reaction between silver nitrate and sodium bromide produces silver bromide, a component of photographic film. (A) If 4.50mol of silver react, what mass of sodium bromide is required?
A 0.9157g mixtureof CaBr2 and NaBr is dissolved in water and AgNO3 is added to the solution to form AgBr Precipitate. If the mass of the precipitate is 1.6930g, what is the percent by mass of NaBr in the original mixture
Write the equation for the formation of the precipitate in the test tube containing the saturated solution of calcium hydroxide.
Draw the structure (on a scratch sheet of paper) for the molecule that fits the following description and then name it according to IUPAC formalism:
What mass of sucrose should be combined with 521 of water to make a solution with an osmotic pressure of 8.15 at 285 ? (Assume the density of the solution to be equal to the density of the solvent.)
Calculate the enthalpy change for the neutralization reaction. Calculate the experimental error compared to the accepted your value in question 2.
Use the Heisenberg uncertainty principle to calculate the uncertainty (in meters) in the position of a honeybee weighing 0.65g and traveling at a velocity of 0.90m/s
Metal X was plated from a solution containing cations of X. The passage of 48.25 C deposited 31 mg of X on the cathode. What is the mass of X (in grams) per mole of electrons.
A buffer solution is prepared by adding 0.125 mol of ammonium chloride to 500 mL of 0.500 M solution of ammonium. What is the pH of the buffer
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