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it takes 1.65 Kj of energy to heat a certain sample of pure silver from 12.0 C to 18.2 C. Calculate the mass of the sample of silver.
A 20.0 ml sample of 0.200 M K2CO3 solution is 30.0 ml of 0.400 M Ba(NO3)2 solution. Barium Carbonate precipitates. The Concentration of barium ions, Ba^2+, in solution after reaction is?
if 8.40 grams of C are burned, how much heat will be released for the following balanced reaction: C + O2 -> CO2 + heat (393 KJ)
Suppose 50 mL of 0.250 M CoCl2 solution is added to 25.0 mL of 0.350 M NiCl2 solution. Calculate the concentration, in moles per liter, of each of the ions present after mixing.
Which of the following is correct? A) Solubility is the concentration of unsaturated ions in solution. B) Ksp is the same as the solubility. C) Ksp is an equilibrium constant and solubility is the concentration of a saturated solution
Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 10.82 g of ethane is mixed with 62.90 g of oxygen.
Hydrogen sulfide decomposes according to the following equation, for which Kc = 0.00011 at a given temperature. 2 H2S(g) 2 H2(g) + S2(g)
A 32.85-{g} sample of a solid is placed in a flask. Toluene, in which the solid is insoluble, is added to the flask so that the total volume of solid and liquid together is 54.00 mL. The solid and toluene together weigh 58.88 g. The density of tol..
A 89 L sample of dry air is cooled from 134°C to -18°C while the pressure is maintained at 2.85 atm. What is the final volume?
A solution is made by dissolving 25g of NaCl in enough water to make 1.00 L of solution. Assume that the density of the solution is 1.00 g/cm3. Calculate the mass percent, molarity, molality, and mole fraction of NaCl
a solution of 1 ppm Pb2+was prepared and dispensed 1 mL of it using a volumetric transfer pipette, also the same solution was dispensed using a measuring (Mohr) pipette.
a quantity of water is heated from 25.0 C to 36.4 C by absorbing 325 joules. what is the mass of the water?
Organic Reactions - Cyclopentadiene, Why is cyclopentadiene monomer more stable at higher temperatures although dicyclopentadiene (dimer) is more stable at lower temperatures?
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