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The mole fraction of a certain electrolyte compound in a solution containing only that substance and water is 0.100. The molecular weight of water is 18.0 g/mol. What additional information is needed to determine the molality of the solution?
a solution containing 3.47mm x analyte and 1.72 mm s standard gave peak areas of 3473 and 10222 respectively in a
Give the structure for an isomer of compound A that has a melting point that is appreciably different from that of A yet NMR spectra that are almost identical to those of A. Include wedge/dash bonds.
the total average change in KE of gas molecules in the container is equal to the the sum of KE of an 8,0x10^-3 -Kg bullet with speed of 770 m/s. what is the Kelvin temp of the gas?
Question- How many unpaired electrons are found in the ground state electron configuration of selenium (Se)
what is the total pressure in a canister that contains oxygen gas at a partial pressure of 804 mm Hg, nitrogen at a partial pressure of 220 mm Hg, and hydrogen at a partial pressure of 445 mm Hg.
A mixture of NaCl and NaBr has a mass of 2.08g and is found to contain 0.78 of Na.What is the Mass of NaBr in the mixture.
A sample of oxygen gas occupies a volume of 555.0 mL at 822 torr and -45?. Calculate the temperature in ? if the gas has a volume of 2.53 L at 491mmHg.
From the following Information, calculate the standard change of enthalpy for the combustion of coal. Compound DeltaHf (kj/mol)
you have a bleach solution of 1904.3 grams. determine how many grams of naocl are in the solution if the percent by
What is the pH of a saturated solution of Ba(OH)2 at 25oC? For Ba(OH)2, Ksp=5.0x10-3
Write balanced chemical equations for the reactions involved when salicylic acid is dissolved in aqueous NaOH and when salicylic acid is precipitated from a sodium salicylate solution by addition of HCl
Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17%, and Rb-87 with mass 86.9092 amu and a natural abundance of 27.83%.
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