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The normal melting point of benzene is 5.5 degrees Celsius . For the process of freezing, what is the sign for each of the following:
a) Delta Hsys b) Delta Ssys c) Delta Gsys at 5.5 degrees Celsius d) Delta Gsys at 0 degrees Celsius e) Delta Gsys at 25 degrees Celsius
a gas cylinder contains 40.0 L of gas at 45.0C and has a pressure of 650. torr. What will the pressure be if the temperature is changed to 100C?
How many milliliters of 0.20M NaOH do you need to neutralize 40.0 ml of 0.12M acetic acid?
Calculate the standard free-energy change for the following reaction at 25 degrees C. 2Au^3+(aq) + 3 Cr(s) 2Au(s) + 3Cr^2+(aq) delta G^degree= ? KJ/mol
Magnesium Hydroxide is a slightly soluble substance. If the pH of a saturated solution of Mg(OH)2 is 10.49 at 25 degrees celcius, calculate Ksp for Mg(OH)2.
Differ from the ideal pressure? The value For N 2 gas is given as , a = 1.390 L2atm/mol2 and b = 3.910E-2 L/mol.
Calculate the theoretical yield when 7.0 ml of acetic anhydride , 4 drops of phosphoric acid
They started with 0.47 grams of a mixture containing 0.143 grams of the acid and recovered 0.117 grams of benzoic acid. What was their percent recovery?
Our stock solutions are 0.2M EDTA, 0.04 M NaF and 1.2 M potassium phosphate. What volumes of the stock solutions should be measured?
hydroxylamine nitrate contains 29.17 mass % N, 4.20 mass % H, and 66.63 mass O. If its molar mass is between 94 and 98 g/mol, what is its molecular formula?
Compute KP at this temperature If the pH of an aqueous solution is 8.23, what are the hydrogen- and hydroxide-ion concentrations of this solution?
For bipyridine (bipy) determine the maximum number of coordination sites that the ligand can occupy on a single metal ion.
What is the molarity of a solution prepared by dissolving 4.92 g of calcium nitrate, Ca(NO3)2, in 250 mL of water? (The molar mass of Ca(NO3)2 is 164 g/mol.)
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