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Construct a table that shows the relationship among the group number, valence electrons lost or gained and the formula metallic and nonmetallic elements: Na Ca Al N S Br
a carbon-hydrogen-nitrogen-oxygen compound has a molecularmass of 116.12 u. in a combustion analysis a 2.464 g sample
Choose the answer which lists the atoms Pb, Ga, Ti, Br, and Sn in order of increasing effective nuclear charge experienced by the electrons in the n = 3 electron shell.
A solution of 0.01M acetic acid is found to have a PH of 3.63 . Calculate the Ka for the acid
hydrogen peroxide is used as a cleaning agent in treatment of cuts and abrasions for several reasons. In the laboratory, small quantities of hydrogen peroxide can be prepared by the action of an acid on an alkaline earth metal peroxide, such as ba..
list the following compounds in order of increasing lattice energy from least negative to most negative lii lif cao
Consider a buffer by dissolving .139 M sodium benzoate and .081 M benzoic acid in water and adjusting the final volume of the solution to 500 mL. pKa of benzoic acid = 4.19. What is the pH of the buffer
20ml of 0.15M H3PO4 is required to neutralize 40ml of a KOH solution. The molarity of the KOH solution is?
What wold you prodict for the relative reactivity of 4-trifluoromehylbenzaldehyde in this aldol condensation reaction. Explain. (Compare to benzaldehyde, 4-methylbenzaldehyde, 4-methoxybenzaldehyde, 4-chlorobenzaldehyde, and 2-nitrobenzaldehyde.
a brick is initially 12.67 cm high and an aluminum can is initially 12.68 cm high. by how much must their
A 10 g sample of acetic acid, HC2H3O2 was burned in a bomb calorimeter in an excess of oxygen. The temperature of the calorimeter rose from 25 degree C to 35.84 degree C
In the first step of the synthesis of PABA, why was it necessary to add sodium acetate to have reaction of p-toluidine with acetic anhydride?
Thyroxine is an important hormone that controls the rate of metabolism in the body, and it can be isolated from the thyroid gland. When 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is 5.2 °C. What is t..
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