Which of the following best describes hydrogen bonding?
A) Strong electrostatic attraction between oppositely charged ions
B) Very strong bonding between cations and anions
C) Very strong bonding from the sharing of electrons between atoms
D) Electrostatic attraction between charged areas of adjacent molecules
E) Weak interactions that become significant when molecules are very close together
D
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Most of the productive coal beds of Paleozoic age are found in rocks formed during the ____________________ period
Fill in the blank(s) with correct word
This is the largest source of atmospheric pollutants
A) volcanic eruptions B) human activities C) forest fires D) heavy winds in dry deserts
What is the formula of the compound formed between the ammonium ion and the carbonate ion?
A) NH4CO3 B) NH4(CO3)2 C) (NH4)2CO3 D) (NH4)3CO3
Amongst the biogeochemical cycles, which one can be said to operate rapidly?
A) Nitrogen B) Carbon dioxide C) Oxygen D) Helium E) Rock