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Determine the amount of heat evolved in the combustion of 1 mol of methane gas to carbon dioxide and water (liquid). Assume standard conditions apply. Methane is CH4 and may be an important automobile fuel someday.
a. 675 kiloJoules
b. 730 kiloJoules
c. 774 kiloJoules
d. 845 kiloJoules
e. 890 kiloJoules
compare the pH of a .040 M HCl solution with that of a .040 M H2SO4 solution. (hint: H2SO4 is a strong acid; Ka for HSO4- = 1.3 X 10^-2)
A student weighed a piece of aluminum foil, rubber band, and a 250 ml flask and found it to be 107.520 grams. After a sample of unknown liquid is vaporized and condensed, the flask, aluminum foil and rubber band weighed 108.148 grams.
write the equation of the following drugs with water- 1) benzoic acid with water
The normal boiling point of bromine is 58.8°C. Given that the vapor pressure of methanol is 75.0 torr at 2.5°C, calculate the molar enthalpy of vaporization of bromine.
5.0ml of 12 M NH3 is added to 500ml of 0.050 M AgNO3. What concentration of silver ion will exist after equilibrium is established. {Kf for Ag(NH3)2 is 1.5 x 10^7
Sulfur trioxide dissolve in water, producing H2SO4. How much sulfuric acid can be produced from 13.5 mL of water and 26.1g of SO3?
Calculate the pH at the following points during the titration of 100.0 mL of 0.20 M acetic acid (Ka for acetic acid = 1.8 x 10-5) with 0.10M sodium hydroxide
How many grams of urea [(NH2)2CO] must be added to 585 g of water to give a solution with vapor pressure 2.63mmHg less than that of pure water at 30 degrees Celsius
the solubility of a salt in water represents the amount of solute necessary to reach a state of equilibrium between saturated solution and undissolved
2Na(s) + Cl2(g) ? 2NaCl(s) If 5.00 g of sodium metal reacts completely with excess chlorine gas, and 11.5 g NaCl is actually obtained, what is the percent yield of sodium chloride
Consider two reactions. Reaction (1) has a constant half-life, whereas reaction (2) has a half-life that gets longer as the reaction proceeds
a researcher suspects that the pressure gauge on a 49.9-l gas cylinder containing nitric oxide is broken. an empty gas
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