Which of the following molecules is(are) polar?

A) BCl3
B) NH3
C) both of them
D) neither of them


B

Environmental & Atmospheric Sciences

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The largest reservoir of unfrozen freshwater is

A. water in the atmosphere. B. groundwater. C. water in the biosphere. D. the water in all lakes and streams.

Environmental & Atmospheric Sciences

What do researchers use to directly measure the rate of productivity?

a. Carbon-12 b. Biomass c. Carbon-14 d. Chloroplasts

Environmental & Atmospheric Sciences

Squid swim by expelling water out a siphon to propel themselves ________

A) backward B) downward C) forward D) leftward E) rightward

Environmental & Atmospheric Sciences

A particular country's opportunities and advantages can be determined by various factors, such as

-a location providing greater access to world markets -arable land for farming -forests for timber & freshwater for fishing -the amounts of available natural or human resources -all of these are correct

Environmental & Atmospheric Sciences