What does percent composition tell you about a molecule? it tells you the ratio of the elements in the molecular formula. it gives you the total number of atoms in the molecule. it tells you how much of a molecule is made up of each element. it tells you how the elements are arranged in the molecule.

the answer is a It tells you the ratio of the elements in the molecular formula.

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

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

hope this : )