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At 25oC, substance A has a vapour pressure of 20cm Hg and a mole fraction of 0.2 and substance B has a vapour pressure of 110cm Hg. When combined they form an ideal mixture (one that obeys Raolt's Law). What will be the total vapour pressure of a mixture of A and B?
You can get sunburn on a cloudy day, but you can't get sunburn even on a sunny day behind glass. Explain.
0.10M potassium chromate is slowly added to a solution containing 0.50 M AgNO3 and 0.05 M Ba(NO4)2. What is the Ag+ concentration when BaCrO4 just starts to precipitate. The Ksp for Ag2CrO4 and BaCrO4 are 1.1 x 10^-12 and 1.2 x 10^-10 respectively..
if grams of ammonia are reacted with 4.75 grams of oxygen gas, how many grams of nitrogen oxide will be produced.
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.253 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 26.9°C.
A 9m^3 room contains a canister of CO2 with a faulty valve. At a level of 75 mole % CO2, breathing the air becomes lethal. The room temperature is 25 degrees Celcius.
Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold. Write a balance chemical equation and identify the oxidizing agent and reducing agent in the reaction
Calculate the energy of the photons and determine which principal quantum levels the transition might come from.
ideal gas originally at STP expands irreversibly and isothermally from point A to point B in the Carnot cycle diagram. It then is expanded reversibly and adiabatically from B to C.
The respective molar heats of fusion and vaporization in kJ/mol for H2O are 6.008 and 40.67. Specific heats in J/g *C for the solid, liquid, and gas phases are 2.092, 4.184, and 1.841, respectively.
what simple test would you use to identify the possible presence of HCl (aq)? what result do you expect if the solution is HCl (aq)?
question what mass of p4s is required to completely consume 25l of h2g at 27 degrees celcius and 0.976 atm in the
How many grams of NH4Cl must be added to 424 mL of a 0.69 M solution of NH3 to prepare a pH = 9.00 buffer.
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