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A 3.026 g portion of a copper(II) salt was dissolved in a 250 ml volumetric flask. a %0 mL aliquot was analyzed by adding 1 g of KI and titrating the liberated iodine with 23.33mL of .046668M Na2S2O3. Find the weight percent of Cu in the salt.
A unit of heat energy that was formerly used frequently calorie. Look up the definition of calorie in your textbook or a handbook and record it here.
The nickel-cadmium battery cell has a standard potential of +1.20 V. The cell reaction is: 2 NiO(OH)(s) + Cd(s) + H2O(l) --> 2Ni(OH)2(s) + Cd(OH)2(s) What is the standard free energy change for this reaction
When 1 gram of nitroglycern, C3H5(NO3)3, decomposes to form nitrogen gas, oxygen gas, gaseous carbon dioxide, and liquid water, 1.9 kcal of heat is evolved. How much heat is evolved per mole of gas formed in the decomposition of nitroglycerine?
Calculate the voltage difference between two points of corroding iron differing only in their partial pressure of oxygen
Calculate the number of moles and the number of grams of the indicated solutes present in each of the following solution samples.
To determine the freezing points of distilled water, 1m glucose, 1m NaCl, 1m CaCl2. Use the freezing point of the pure water as a baseline to determine deltaTf for each of the solutions
Dinitrogen monoxide is still used as a general anesthetic. The Henry's law constant for the solubility of N2O in water is 2.5 x 10^ -2 mol/L x atm. What is the molar solubility of N20 in water if the partial pressure of N2O is 1500 mm Hg
Which proton(s) in 1-phenylethanol corresponds to the tall singlet at about 7.40 ppm in the 1H NMR?
a student dissolves 1.50g of copperii nitrate in water. after adding aqueous sodium carbonate solution which contains
a sample of neon has a volume of 610 ml when it is at a pressure of 867 mmhg. what will be the volume when the pressure
When electrical current of unknown magnitude is run through the device for 3.50 min, 16.1 mL of water-saturated H_2(g) is collected. The temperature and pressure of the system are 25 degreesCelsius and 715 torr.
Nitrogen dioxide dimerizes to produce dinitrogen tetroxide. Give a possible explanation for why this reaction occurs
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