How many molecules are in 25.0 grams of nh3

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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