Astudent says that since the atomic theory is just a theory, it should not be considered useful. which statement best argues against the student’s opinion? a) scientific theories change over time b)scientific theories are the results of many experiments and observations c) scientists often do not agree about specific details of scientific theories d) scientists often propose competing theories e) scientific theories do not become scientific laws

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.