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Assuming gasoline is 89.0% isooctane, with a density of 0.692 g/mL, what is the theoretical yield (in grams) of CO2 produced by the combustion of 1.56 x 1010 gallons of gasoline (the estimated annual consumption of gasoline in the U.S.)? Remember, there are 3.785 liters in 1 gallon and assume that isooctane is the only carbon containing component of gasoline.
An enzyme reduces the activation energy of a reaction at the temperature of 25 degree celsius from 55 kjmol-1 to 15kJ mol-1 by changing the route of the reaction.
Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more com- plicated, but this is a reasonable ?rst ap proximation.)
prepare 100 mL each of five standard solutions: 2.00 x 10-5, 5.00 x 10-5, 1.00 x 10-4, 2.00 x 10-4, and 5.00 x 10-4 M. These will serve as your analytical standards, which means that their phosphate concentrations must be precisely known.
What is the molality of a solution prepared by dissolving 413 mg of KBr in 6.45 mL of water at 25.0 0C. The density of water at 25.0 0C is 0.997 g/mL.
what is the % mass of acetic acid in the vinegar? Hint: What is the mass percent of aceditc acid titrated and what is the definition of % mass?
Calculate the molality of a sucrose (C6H22O11) solution containing 14.3 g of sucrose in 676 g of water
Reactions of alcohols with hydrogen halides yield the important class of compound known as alky halides. Reactivity towards the hydrogen halides with an alcohol decreases
How many grams of dry NH4Cl needed to be added to 1.50L of a 2.00M solution of ammonia NH3 to prepare a buffer solution that has a pH of 8.60?
Small helium-neon lasers emit 1.51 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
If 482.4 mL of 16.5 M H2SO4 solution is diluted to 5.6 L, what is the new concentration of H+ in the diluted solution?
What was the percentage by mass of Mg(OH)2 in the original sample? [Hint: When Mg(OH)2 or Al(OH)3 reacts with HCl(aq), the products are a chloride salt, water and CO2(g). Assume that all of the CO2(g) leaves the solution without reacting.]
A sample of gas at 47°C and 1.03 atm occupies a volume of 2.20 L.What volume would this gas occupy at 107°C and 0.789 atm?
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