Which of the following molecules can have dipole-dipole interactions?

A) CH4
B) H2S
C) both a and b
D) neither a nor b


B

Environmental & Atmospheric Sciences

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The first major US initiative to clean up the nation's air was

A) the 1870 Clean Air Act. B) the 1920 Clean Air Act. C) the 1970 Clean Air Act. D) the Magna Carta.

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Which of the following are found near plate boundaries?

A. volcanoes B. mid-ocean ridges C. trenches D. earthquakes E. All of these choices are correct.

Environmental & Atmospheric Sciences

The decrease in the worldwide fertility rate is likely linked to urbanization and increased opportunities for women.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

What organism usually fixes nitrogen into usable chemical forms?

A) Archaea B) Extremophiles C) Cyanobacteria D) All of these choices

Environmental & Atmospheric Sciences