How does water dissolve sodium chloride (NaCl)?
A) ?Water molecules neutralize sodium ions (Na+) and chloride ions (Cl-).
B) ?The polarity of water causes the sodium ion (Na+) to separate from the chloride ion (Cl-).
C) ?When seawater evaporates, its ionic components combine to dissolve table salt.
D) ?Water molecules expand causing sodium ions (Na+) and chloride ions (Cl-) to decompose.
B
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Cellulose, the macromolecule found in plant cell walls, is a
A. protein. B. lipid. C. nucleic acid. D. carbohydrate.
Which of the following defines thermal belts?
A. pockets of cold air resting on a valley floor at night B. warmer hillsides that are less likely to experience freezing conditions C. cold, below-freezing air found at the top of a mountain D. pockets of warm air resting on a valley during the afternoon
What term refers to an established language used for communication by people whose native tongues are mutually incomprehensible?
A) official language B) lingua franca C) Creole D) Pidgin
What geographic factor accounts for the fact that both Americans and the British speak English?
What will be an ideal response?