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What volume, in L, of hydrogen gas at standard temperature and pressure (STP) is produced from reacting 0.333 L of 0.807 M hydrochloric acid with aluminum metal? (1 mol of gas @ STP = 22.4 L).
How many grams of dry NH4Cl need to be added to 2.50 L of a 0.800 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.74? Kb for ammonia is 1.8*10^-5.
Given equilibrium pressure, calculate Kp, When heated, ammonium carbonate decomposes as follows. NH4CO2NH2(s) f/r2NH3(g)+CO2(g)
Calculate the change in entropy when one mole of ice at ?10.0°C and 1 atm is converted to liquid water at ?5.0°C and 1 atm
Assume that no heat is lost to the surroundings or to the coffee cup itself. Assume that the mass of the solution is equal to the mass of the water.
You are a laboratory assistant for your chemistry course. There are 250 students in the course, and each needs to use 25 mL of a 0.15 M solution of copper sulfate.
Calculate the pH of a buffer that contains 0.270 M hydrofluoric acid (HF) and 0.180 M cesium fluoride (CsF). The Ka of hydrofluoric acid is 6.80 x 10^-4.
if a sample of gas is at 2 atm and is at 15 degrees celsius, what would be the new pressure in the gas if the gas is heated to 100 degrees celcius?
Calculate the rate constant for the reaction when the reactant concentration in a first-order reaction is given 7.30×10-2M after 15.0s and it is also reported 4.40×10-3M after 65.0s . ?
column of air with a pressure of 1.57 *10^5 Pa and an area of 1.15 m^2 and given that the acceleration due to gravity is 9.8 m/s^2, what is the mass of this column?
If you dissolve 4 aspirin tablets in a 340mL glass of water, what is the pH of the solution and the percent dissociation?
By comparison, what would it cost to heat the home using a ground source heating system with an electrically powered heat pump that has a COP of 5.0?
Explain, in detail, how you would prepare this solution so a labmate could prepare it from your instructions
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