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[BrO- ]initial is 0.86 M. 65 seconds later [BrO- ] is 0.19 M. What is the rate of change of [BrO- ] in M/s? (The brackets, [ ], indicate concentration, that is, molarity (M) or moles/liter.)
consider the following factswater freezes spontaneously at -5c and 1 atm and ice has a moreordered structure than
The percent ionization of octylamine in a .10 M aqueous solution is 6.7%. What is the pH of the solution and the Kb of octylamine?
Magnesium hydroxide (Mg(OH)2) reacts with hydrochloric acid to produce magnesium chloride and water. How many liters of 0.8 M HCl react with 0.25 grams of magnesium hydroxide
a 0.442 g sample of a nonvolatile solid solute dissolves in 15.0 g of t-butanol. the freezing point of the solution is
What is the change in internal energy (in J) of a system that absorbs 0.582 kJ of heat from its surroundings and has 0.267 kcal of work done on it
For the following reaction, Kc = 0.513 at 500 K . N2O4(g) 2NO2 (g)
Many gaseous reactions occur in a car engine and exhaust system. One of the reactions is NO2(g)+CO(g)-->NO(g)+CO2(g). Given the following information determine the overall rate order. Rate=K[NO2]^m [CO]^n
lysozyme is an enzyme that breaks bacterial cell walls. a solution containing .150 g of the enzyme in 210 ml of
A 12.5% by mass solution of sodium chloride (NaCl) in water has a density of 1.115 g/mL at 20 degrees C. What is the molarity of this solution
A sample of helium gas has a volume of 900. milliliters and a pressure of 2.50 atm at 298 K. What is the new pressure when the temperature is changed to 336 K and the volume is decreased to 450. milliliters?
If 34.0 mL lead(II) nitrate solution reacts completely with excess sodium iodide solution to yield 0.640 g precipitate, what is the molarity of lead(II) ion in the original solution?
What will be the temperature difference needed in a hot-air balloon to lift 1.00 kg of mass. Assume that the volume of the balloon is 100 m3, the temperature of the ambient air is 25 oC, the pressure is 1.00 bar, and air is an ideal gas with an av..
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