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A sample of pure oxalic acid hydrate was obtained by extracting a plant called Snake Tongue. A 3.000 g sample of the materials heated carefully in a vacuum oven until no more mass was lost from the sample. After heating, th final weight of the material was 2.143g. What is the formula of the oxalic acid hydrate, (COOH)2 *X H20? (mol.wt. (COOH)2=90.0)
The solubility of lead (II) sulfate is 4.0x10^-2 g/L. What is the solubility product constant for lead (II) sulfate?
magnesium hydroxide is used in several antacid formulations. when it is added to water it dissociates into magnesium
What is the activation energy for the reaction shown below k=1.89x10^-8 /s at 540 K and 2.45 x 10^-7 at 601 K
The next day you notice that some of the gas has leaked out. The pressure and temperature remain the same, but the volume has changed to 10.0 L. How many moles of gas (n2) remain in the cylinder
Which of the following involve an increase in the entropy of the system under consideration?
Tarnish (silver sulfide) may be removed from a silver spoon by placing the spoon in contact with a metallic container holding a solution of baking soda.
Experimental solid-oxide fuel cells that use butane (C4H10) as the fuel have been reported recently. These cells contain composite metal/metal oxide electrodes and a solid metal oxide electrolyte. Consider the following unbalanced half-reactions:
Salicylic acid, used in the synthesis of aspirin, has mass composition 60.87% C, 4.38% H, and 34.75% O. What is the empirical formula of the compound.
henrys law constants for aqueous solutions at 25degc are 8.20 times 10-7 molalmmhg for n2 and 1.62 times 10-6 molalmmhg
The PH° of formation values for water vapor and liquid water are -241.82 and -285.83 kJ/mol, respectively. Calculate the PH° of vaporization for water in kJ/mol.
Write a balanced, net ionic equation for the precipitation reaction of cacl2 and cs3po4 in an aquaeous solution.
What is the quantity of moles, of neon gas if 4.87 L is at a pressure of 0.635 atm and the temperature
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