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If the barometric pressure is 784 torr and the experiment is carried out at 25 oC, what is the pressure of the gas collected?
Determine the molality of a solution prepared by dissolving 0.500 moles of CaF2 in 11.5 moles H2O.
Determine which species is present in the lowest concentration in 0.10 M H3A solution?
How many grams of the strong acid HClO4 must be combined with water to make 400 ml of a solution with a pH of 1.5.
A piece of copper alloy with a mass of 60.0 g is heated from 21.0 ?C to 44.0?C. In the process, it absorbs 507 J of energy as heat. What is the speci?c heat of this copper alloy.
Suppose 10.0 g of CH4 is used in a reaction that can theoretically produce 95.8 g of CCl4. What is the percent yield of CCl4 if the reaction produces only 80.0 g of CCl4.
A certain first order reaction has a rate constant of 0.0215 s-1 at 24 degrees C. What is the value of rate constant at 70 degrees C if Ea=90.0 kJ/mol.
A mixture of CaCO3 and CaO weighing 0.665 g was heated to produce gaseous CO2. After heating, the remaining solid weighed 0.500 g.
Determine how many kgs of Ca are there in a 205-pound man If 1.4 percent of the mass of a human body is calcium(Ca)?
How many grams of chromium would be electroplated by passing a constant current of 5.2 amperes through a solution containing chromium(III) sulfate for 45.0 minutes.
Detrmine What mass of lithium (in g) is needed to react completely with 57.9 mL of Nitrogen gas at Standard atmospheric conditions?
calculate the freezing point of a nonionizing antifreeze solution containing 388 g ethylene glycol, C2H6O2 and 409 g of water.
Calculate w (in kJ) when 265 g iron (III) oxide (MM = 159.7 g/mol) reacts with excess carbon to produce carbon dioxide gas at 358 K
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