in a synthesis reaction, two atoms of sodium (na) combine with one molecule of chlorine gas (cl2) to produce sodium chloride (nacl). how many molecules of sodium chloride are produced?

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During a load test, a battery's voltage drops below a specified value. what action should the technician take?

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.