On the graph, what's the relationship between the concentration of atmospheric CO2 and time? As years move closer to the present time, the percentage of atmospheric CO2 remains constant. As years move closer to the present time, the percentage of atmospheric CO2 increases. There's no visible correlation between the progression of years and the percentage of atmospheric CO2. As years move closer to the present time, the percentage of atmospheric CO2 decreases.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

can you list the answers so i can answer

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;