Chemistry questions below! (●'◡'●)

(1) • Balanced Equation : 2HgO (s) ---> 2 Hg (l) + O₂ (g)

• Line a is represented by activation energy, or the smallest amount of energy needed for molecules to undergo a chemical reaction.

• Activated complex is the intermediate state during the conversion of reactants into products. In this case it is represented by Hg----O-----O----Hg. The dashed lines indicate that the bond between Hg and O are breaking and their length is increasing and the dashed line between oxygen atoms indicate that the bond is decreasing and bond formation is taking place.

• This reaction is endothermic as the energy of reactants is smaller than the energy of products.

(2) • Balanced Equation : CH₃Br + OH⁻ ---> CH₃OH + Br⁻

• The hydroxide ion reacts with the bromomethane, resulting in a double replacement reaction. The 'CH₃' in 'CH₃Br' joins with the hydroxide ion to form CH₃OH, while the Br breaks off as an ion.

• Take a look at the energy diagram below.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this