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what would be the effect on my calculated molecular weight of p-dichlorobenzene if my lab partner left the stopper off of the apparatus while I was weighing the solid p-chlorobenzene. Explain in detail what would happen if this occured and how it would affect my result.
When benzoic acid is partitioned between diethyl ether and queous sodium hydroxide solution and the aqueous layer is separated, acidification of the aqueous solution yields a precipitate.
The specific heat of liquid water is 4.184 J/g x C. Calculate the energy required to heat 10.0 g of water from 26.5 C to 83.7 C.
If a random sample of this element collected from the tail of a comet has an weighted average atomic mass of 10.788 amu, what is the percent abundance of the lower-mass isotope?
buffer solution from a solution of 0.200-M aniline, C6H5NH2, a weak base, and a solution of 0.100-M hydrochloric acid. take the pKa of aniline to be 9.13.
A solution is prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.20 M HOCl. What is the pH of this solution? [Ka(HOCl) = 3.2 ? 10-8]
Do these lambda maxs indicate an increase or a decrease in the energy of the light absorbed as the number of EN ligands bound to Cu(II) increases
Kn1 knowledge and understanding of atomic and molecular structure, chemical bonding, chemical formulas, chemical equations, mole calculations and the mole concept and the relation between elements of the Periodic Table.
How would the following modifications of the experimental procedure used in this experiment affect the mass of the precipitate collected? Indicate whether the mass would be greater than, unchanges, or less than that obtained. Briefly explain the ..
a gas sample in an open manometer system has a pressure of 530 mmHg . The mercury column has a height of 545 mm on the gas sample side and a height of 425 mm on the air pressure side. what is the value of the air pressure in mmHg?
Calculate the pH of a buffer solution that is 0.200 M HC2H3O2 and 0.100 M in NaC2H3O2. Calculate the pH of the buffer that reults from mixing
The standard free energy change for the hydrolysis of ATP is -30.5 kJ. In a particular cell, the concentrations of ATP, ADP, and Pi are 2.8×10-3 M, 1.1×10-3 M, and 4.7×10-3 M, respectively. Calculate the free energy change for the hydrolysis of und..
A 245 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 120 mL, how many moles of CN- ions will be contained in the dilute solution?
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