The temperatures in a fractionating tower at an oil refinery are important, but so are the pressures. Where might the pressure in a fractional distillation tower be greatest, at the bottom or at the top? Defend your answer.
A. The pressure is greatest at the bottom because the lower temperature means a greater number of vaporized molecules.
B. The pressure is greatest at the bottom because the higher temperature means a greater number of vaporized molecules.
C. The pressure is greatest at the top because the higher temperature means a greater number of vaporized molecules.
D. The pressure is greatest at the top because the lower temperature means a greater number of vaporized molecules.
Ans: B. The pressure is greatest at the bottom because the higher temperature means a greater number of vaporized molecules.
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What happens to the corrosive properties of an acid and a base after they neutralize each other? Why?
A) The corrosive properties are neutralized because the acid and base no longer exist. B) The corrosive properties are unaffected because salt is a corrosive agent. C) The corrosive properties are doubled because the acid and base are combined in the salt. D) The corrosive properties remain the same when the salt is mixed into water.
Rain shadows in mountainous areas are a result of
A) convection. B) orographic uplift. C) frontal uplift. D) adiabatic cooling.
Which of the following has the highest boiling point?
A) heptane B) hexane C) octane D) nonane
Identify the four steps to tropical deforestation.
What will be an ideal response?