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Which is the Alkali metal used in photovoltaic cell? Name it
How many kilojoules ore released when 3.6 L H2(g) and 2.4 L F2(g) react to form HF(g) at a constant pressure of 1 atm and initial and final temeratures of 25 C
Predict its structure by drawing the most stable dehydration product that could result after a single carbocation rearrangement of the intermediate?
How many grams of water at 0oC could be frozen to ice at 0oC by the evaporation of 493 grams of isopropyl alcohol?
How many grams of dry NH4Cl need to be added to 1.50 L of a 0.500 M solution of ammonia, NH3,to prepare a buffer solution that has a pH of 8.79? Kb for ammonia is 1.8*10^-5.
How much heat is absorbed by a 125g sample of water when it is heated from 25.200C to 32.800C? The specific heat of water is 4.184 J/g0C.
A set of two gas bulbs, with volumes of 500 mL and 300 mL, are connected by a closed stopcock. The 500 mL bulb contains 450 torr of Ne gas, and the 300 mL bulb contains 150 torr of Cl2 gas
Calculate the hydronium concentration for a solution prepared by dissolving 0.15 mol of benzoic acid (C6H5COOH) and 0.30 mol of sodium benzoate (C6H5COONa) in 1.00 L of solution. (Ka of C6H5COOH = 6.5 x 10-5)
A container holds 355mL of a mixture of nitrogen with carbon dioxide gases. The container is found to have a tiny leak. Assume which gas is escaping faster
at 80c the vapor pressures of pure liquids x y and z are 385 190 and 66 mmhg respectively. what pressure must be
A 6.55mg/L solution of benzoic acid has an absorbance value of 0.621 at 230 nm in a 1.00cm cell. in units of M^-1*cm^-1, what is the molar absorptivity of benzoic acid at 230nm?
Calculate the equilibrium [F-] in a saturated solution of CaF2 and 0.0214 M Ca(NO3)2. Take ionic strength effects into account.
Nitrogen forms several gaseous oxides. One of them has a density of 1.27 g L-1 measured at 764 mmHg and 150C. write the formula of the compound
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