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A zero-order reaction has a constant rate of 1.70×10-4 . If after 65.0 seconds the concentration has dropped to 7.00×10-2 , what was the initial concentration?
A 26.0-g sample of ice at -10.0°C is mixed with 114.0 g of water at 72.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
the heat of combustion of butane is -2878kj/mol assume a typical cigarette litter hold about 1.75 grams of butane how much energy would be released
A form of the polypetide hormone angiotensin II has the amino acid composition ( ASP, ARG, ILE, MET, PHE, PRO, TYR, VAL). The following observations are made
What is the mass of 8.00 1022 molecules of tetraphosphorus decaoxide? (b) How many P atoms are present in this sample?
when 1.0g of salicyclic acid is used with 2mL of acetic anhydride, which compound is the limiting reagent?
transferred from an oven (183°C) to 189 g of water at 23.2°C, into which it is immersed. The water and steel together reach a temperature of 27.9°C. What is the mass of the steel in grams
A cell that uses bromine to oxidize hydrogen H^+ under standard conditions at 298 K has a positive potential.
calculate the change internal energy (E) for a system that is giving off 45.0kJ of heat and is performing 855J of work on the surroundings.
A 125 g aluminum block at an initial temperature of 95°C is dropped into a styrofoam flask containing 150 mL of water at 20°C. What is the final temperature?
What volume of gas, measured at 690 torr and 40 degrees celcius, is required to form 29g of NaCl?
Determine the collision frequency at room temperature and compare this with the rate constant and teh Arrhenius parameters determined above.
Suppose that 23.2 mL of 0.410 M sodium chloride is mixed to 23.2 mL of 0.339 M silver nitrate. Determine how many moles of silver chloride would precipitate?
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