19. Suppose the students had mixed a 12.5 g sample of Margarine B and a 12,5 a samplerde Margarine C. Further suppose that they had tested this mixed sample following the procedure
from Experiment 1. Based on Table 1. predict the most likely mass, in grams, of water in the
mixed sample. Explain your answer using specific numbers from Tablel.

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:

i belive it is water

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.