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Compare the rate of effusion of NH3 with that of N2 at the same temperature and pressure. Compare the time required for equal numbers of moles of N2 and NH3 to effuse.
A quantity of N2 occupies 62.2 L at a particular temperature and pressure. Its density is 0.900 g/L. How many moles of N2 are in the container?
How much water would you add to 50.0mL of 0.400M NaOH if you wanted the final concentration to be 0.200M ?
entropies of atom combination to determine if any of the following reactions have an equilibrium constant greater than 1. Find the reaction with the greatest equilibrium constant. Find the reaction with the smallest equilibrium constant.
When 26.5 grams of a substance absorbs 40.1 J of heat, the temperature of the substance increases from 27.0oC to 68.3oC. What is the specific heat of the substance
solutions of ag plus, cu 2 plus, fe 3plus, and Ti 4 plus are electrolyzed with the constant current until 0.10 mole of metal is deposited. which will require the greatest lenght of time.
What is the concentration of Br- (aq) in a solution prepared by mixing 75.0ml of 0.62M iron (III) bromide with 75.0ml of water? Assume volumes are additive.
If 67.0 mL of 0.119 mol/L NaOH(aq) and 35.0 mL of 0.193 mol/L HA(aq) are mixed, then what is [HA] at equilibrium? Assume that HA is a weak monoprotic acid with pKa=6.23 at 25oC.
The human body obtains 955 of energy from a candy bar. If this energy were used to vaporize water at 100.0 , how much water (in liters) could be vaporized? (Assume the density of water is 1.00.)
Calculate the CNaOAc and CHOAc necessary to make the desired buffer. Remember, the 0.100M specification indicates
At constant pressure, the combustion of C2H6 releases 259 kJ of heat. Find delta H for the rxn: 2 C2H6 (g) + 7O2 (g) -> 4CO2 (g) + 6H20(l)
You add 1.0mL of 1.00 M HCl to the buffer. Calculate the molarity of H3O+ added as HCl, and the final molarities of acetic acid and acetate ion at equilibrium. what is the new value of pH
What modification occurs when a small amount of p-divinylbenzene is added to the reaction mixture during the polymerization reaction of styrene to form polystrene
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