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Perchloroethylene, as well known as perc, is the solvent utilized in most dry cleaning. It consists of C and Cl. Find out the empirical formula of perchloroethylene given that a 2.58-g sample yields 1.37g Co2 in a combustion analysis experiment. Add subscripts to entire the empirical formula.
(Nitration of Methyl Benzoate Worksheet Lab) The nitric acid used in the experiment is greater than 90% pure nitric acid. Why does the yield decrease as the percentage of water in the nitric acid increases. Why is the nitration of aromatic rings a..
Using the peak intensities provided below for the molecular ion region of an unknown, draw the corresponding mass spectrum. Be sure to label the axes and any peaks.
A water sample has a pH of 8.21 and a total calcium concentration of 143 ppm. What is the total alkalinity of the water?
Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1. What is the frequency of the incident light on the sodium metal surface
What types of bonds are responsible for the secondary structure of a protein? How would the addition of a heavy metal affect the secondary structure of a protein?
If a 190 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.4x1.0 ft , what is the average thickness of the sheet in meters?
Determine the mass of silver chloride is produced from 75.0 grams silver nitrate
A buffer is prepared by adding 21.0g of sodium acetate ({\rm CH_3 COONa}) to 520mL of a 0.140M acetic acid ({\rm CH_3 COOH}) solution.
Write the structural formula and name of the organic product for the following reaction between an alkyne and an alkyl halide.
write balanced molecular ionic and net ionic equations for the reactions of chromium gives cr3 with solution of dilute
how much energy in j is required to excite a hydrogen atom from its ground state to its first excited state? what is
BICINE is a compound that contains a tertiary amino group. You have 0.5 L of 0.05 M BICINE with its tertiary amine in the unprotonated form. How much 0.2 M HCl or 0.2 M NaOH must be added in order to create a BICINE buffer solution pH = 7.5. (pKa ..
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