Important moleculear discoveries in the 1980s have led researchers to hypothesize theat the original vital orgnaic molecule shaping living things was not what was first thought. what molecule is currently supported as the candidate for the vital molecule for earlly life?

RNA

Explanation:

Oparin-Haldane hypothesis says that the life gradually arose from amino acids and then they combining to make the complex polymers.

Miller-Urey experiment provided first evidence that the organic molecules needed for the life could be formed from the inorganic components.

Currently, Scientists support RNA world hypothesis. It suggests that first life was the self-replicating RNA. Thus, RNA is vital molecule for the early life.

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

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.