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If a car has an airbag that has a volume of 60.0L and the bag requires a pressure of 2.37 atm at 25.00C, calculate the grams of sodium azide needed to inflate the bag.
Given that the vapor pressure above pure A at 85 degrees Celsius is 0.79 atm, what is the vapor pressure (in atm) of A above the mixture?
What is the final temperature when 125 g of iron at 92.3 °C is dropped into 50.0 g of water at 27.7 °C? The specific heat of iron is 0.444 J g-1 °C-1 and the specific heat of water is 4
187 g of sodium azide is dissolved in water to make a solution with a final volume of 1.0L. What is the concentration and pH of the solution?
How much heat in kj would be required to vaporize 1.00 L of diethyl ether (C4H10O), density is 0.714g/mL at 298 K, if the enthalpy of vaporization at this temperature is 26.0 kj/mol?
Need down wind concentrations for a dirty bomb dust cloud that carries toward a nearby downtown area on a light wind speed of 10 mph.
Calculate the moles of aluminum ions present in 250.0 g aluminum oxide. Determine the number of oxygen atoms present in 25.0 g of carbon dioxide.
[Mn(bipy)(N3)2] is a coordination complexwith azide ion. What is the charge on the manganese? What is the overall charge on the complex? What is the name of this coordination complex?
What is the value for the standard internal energy of formation for acetyl chloride, CH3COCl (l)?
In most general chemistry courses, students calculate the molar mass (MM) of a volatile liquid using the ideal gas law (PV = nRT) in the following form: MM = (mass of vapor*R*boiling point in Kelvins)
If the final temperature reached by the alloy sample and water is 27^{circ}{rm C}, what is the specific heat ({rm cal}/{rm g}^circ{rm C}) of the alloy?
A sample of propane,C3H8, contains 11.7 moles of carbon atoms. How many total moles of atoms does the sample contain?
A 245 mL stock solution contains 0.9 M Ca(CN)2. When 105 mL of the stock solution is diluted to 125 mL, how many moles of CN- ions will be contained in the dilute solution?
What is the pH at the half-stoichiometric point (half-way to the endpoint) for the titration of 0.22 M HNO2(aq) with 0.10 M KOH(aq)?
The specific heat of ethanol is 2.44j/g times degrees celcius. How many kilojoules of energy are required to heat 50.0 g of ethanol from -20.0 degrees celcius to 68.0?
Suppose that 1.331 g of impure barium hydroxide is dissolved in enough water to produce 250. mL of solution and that 35.0 mL of this solution is titrated to the stoichiometric point with 17.6 mL of 0.
What is the crystal lattice energy of LiI? Sublimation energy for Li is 155 kJ/mol and ionization energy for Li is 520 kJ/mol. Sublimation energy for I2 is 62 kJ/mol and dissociation energy for I2 i
If 6.06 L of O2 gas is collected over water at 250C (vapor pressure = 23.8 torr) and a barometric pressure of 702 torr, what is the mass of H2O2 (MM = 34.02 g/mole) decomposed?
The reaction of peroxydisulfate ion (S2O8)2- with iodide ion (I-)is, S2O82-(aq) + 3I-(aq)= 2SO42-(aq) + I3-(aq) From the following data collected at a certain temperature, determine the rate law and c
A solution is prepared by dissolving 4.21g of a nonelectrolyte in 50.0 g of water. If the boiling point increases by .203C, what is the mass of the solute?
The molar heat of solution of a substance is found to be +35.34 kJ/mol. The addition of 0.20 moles of this substance to 1.5 L water initially at 55. °C results in a temperature decrease. Assume
Phosphorus pentachloride, PCl5, a white solid that has a pungent, unpleasant odor, is used as a catalyst for certain organic reactions. Calculate the number of moles in 38.7 g of PCl5.
Consider the following reaction, equlibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of SO3(g)
In the reaction between potassium carbonate and calcium nitrate (balanced eq: K2CO3 + Ca(NO3)2--> K2(NO3)2 + CaCO3), why wouldn't ...--->2KNO3 +CaCO3 be right?
A certain first-order reaction () has a rate constant of 7.50×10-3 at 45 . How many minutes does it take for the concentration of the reactant, to drop to 6.25 of the original concentration?