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A 0.879-g sample of a CaCl2x2H2O/K2C2O4xH2O solid salt mixture is dissolved in 150 mL of deionized water, previously adjusted to a pH that is basic. The precipitate, after having been filtered and air-dried, has a mass of .284 g. The limiting reactant in the salt mixture was later determined to be CaCl2x2H2O.What is the molecular form of the equation for the reaction?What is the net ionic equation for the reaction?
At the end of the process, the pressure is 2.50x10 to the 6 Pa. Calculate the final temperature of the gas. Calculate q, w, deltaU, and deltaH for this process.
a 40.0 mass percent solution of ethylene glycol c2h6o2 in water has a density1.0514gml. find the molality
silver nitrate reacts with sodium chloride to form solid silver chloride and sodium nitrate. how many grams of sodium
Which of the following statements is incorrect about benzene?
Urea ((NH2)2CO) can be formed from ammonia and carbon dioxide as shown in the following reaction. ?H° value for this synthesis is -134.0 kJ, and ?S° is -424.0 J/K. Calculate the ?G°f for urea. 2NH3(g) + CO2(g) ? (NH2)2CO(s) + H2O(l)
How many seconds are required to produce 1.0 g of silver metal by the electrolysis of a AgNO3 solution using a current of 30 amps?
If energy obtained from burning 1.23 pounds of butane (feul value is 10.85 kcal/g) is used to heat 126.5 kg of water at an initial temperature of 20.7 degrees C, what is the final temperature
How many grams of FeSO4.(NH4)2SO4.6H2O (MW = 392.14) must be dissolved and diluted to 250.0 mL to prepare an aqueous solution that is 10.00 ppm Fe2+ by weight (1.00 ppm = 1.00 mg/L)
Calculate the amount of heat, in kJ, needed to convert 15.0 g of ice at -21 C to liquid water at 75 C. Specific heat of ice = 2.10 J/(g C); heat of fusion of ice = 334 J/g; Specific heat of water = 4.18 J/(g C)
a metal object with a mass of 19g is heated to 96 degrees C, then transferred to a calorimeter containing 75 g of water at 18 degrees C. The water and metal object reach a final temperature of 22 degree C.
Calculate the freezing point of a solution of 500.0 g of ethylene glycol (C2H6O2) dissolved in 500.0 g of water. Kf = 1.86 degrees C/m and Kb
A sample of fresh grapefruit juice was filtered and titrated with the above I2 solution. A 100 mL sample of the juice took 9.85 mL of the iodine solution to reach the starch endpoint.
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