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In one experiment, a student added a total of 15.00 mL of 0.5241 M HCl to 1.4881 g to of an unknown which contained CaCO3 (molar mass = 100.09 g/mol). The resulting solution required 12.21 mL of 0.1211 M NaOH to back titrate the excess HCl. What was the percent CaCO3 in the unknown? Report your answer to two (2) decimal places.
electrons are ejected with a kinetic energy of 3.54x10^-19 J. What is the work function of the metal in joules?
the experiment is then repeated with the copper immersed in a stream of water that maintains its temp at 293. Calculate the change in entropy of the copper and the water in this case.
how many grams of acetylene are produced by adding water to 5g of CaC2?
Saturated sodium chloride. describe what happens when 12 M HCl is added to saturated (5.4 M) NaCl. Calculate [Cl-] in the original solution and after the addition of the 12 M Hcl (before any precipitate forms).
Consider two solutions. One solution is 0.1115 M Ca(OH)(2). The other is 0.1050 M HClO(4). a) Write a balanced equation for the reaction between the two solutions.
What are the main mononitro products of the nitration of the following compounds - Write structural formulas for the compounds
What is the velocity of an electron that has a de Brogile wavelength of 4.22 nm?
what percentage of HSO4- is dissociated in 2M solution? Why does molarity approximate molality at low concentrations?
Which one of these is liquid bromine, fluorine gas, or oxygen gas?
A chemist found that a reaction did not take place under any set of conditions. If the chemist added a catalyst, would the reaction then occur?
A given mass of radium is over a million times more radioactive than the same mass of uranium
Draw a six carbon alkyne that can exist as diastereomers. The molecule should only contain only carbon
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