What is the difference between synfuels and synthesis gas? What will be an ideal response?
Synfuels are liquids derived from coal, whereas synthesis gas is methane derived from coal.
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Which of the following conditions is associated with the polar front?
A. sinking air aloft B. air divergence at the surface C. clear skies D. an elongated region of lower pressure
How often during a year is the sun directly overhead at Mexico City (latitude 19°N)?
A. twice B. never C. four times D. once
Outline the factors that contribute to the severity of a storm surge. What will be an ideal response?
An atom of sodium (Na) has a single electron in its outer shell and an atom of chlorine (Cl) has seven (7 ) electrons in its outer shell. What happens when these two elements bond?
A)Sodium becomes negatively charged. B)The compound becomes poisonous. C)Sodium shares its electron with chlorine. D)Chlorine becomes positively charged. E)There is a transfer of one electron from sodium to chlorine.