The boiling point of methanol is 65°C, and the boiling point of ethanol is 78°C. Which of the following statements is true?
A. At 40°C, the methanol reacts with the ethanol.
B. At 70°C, you would have methanol gas and liquid ethanol.
C. At 50°C, you would have methanol and ethanol as gases.
D. At 90°C, you would have methanol and ethanol as solids.
E. none of the above
Answer: B
You might also like to view...
Carbon dioxide concentrations in the Northern hemisphere fall from spring through autumn as carbon is taken up in growing plants, and rise through the winter as organic matter decays
Indicate whether the statement is true or false.
What is the path of comets around the sun?
a. ?They range far beyond the planetary part of our solar system and loop past the sun and back into outer space. b. ?Their path is the same as Earth. c. ?They have a circular orbit around the sun. d. ?They orbit Earth, not the sun. e. ?They don’t orbit the sun; they are pulled to the sun by its gravity and eventually crash into it.?
?Match the term with the correct description.
A. ?the concentration of this gas increased from 318 ppm to 400 ppm between 1960 and 2015, primarily due to fossil fuel use B. ?greenhouse gas emitted by human activities including livestock production, rice production, natural gas production, landfills, and the flooding of land behind large dams C. ?potent greenhouse gas that has increased in the atmosphere primarily due to the increased use of fertilizers D. ?this gas amplifies the warming effect of other greenhouse gases E. ?suspended microscopic droplets and solid particles in the atmosphere
Which area(s) on this world map is (are) likely to have volcanoes above sea level?
A. A B. B C. C D. D