Hydrocarbons in which carbon atoms are connected by only single bonds in straight chains or branched chains are called a. alkanes.
b. alkynes.
c. alkenes.
d. aromatic hydrocarbons.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

i think it is true since you can test the answer and can use observations to complete it.

its first and third is your answer i did the qustion the fourth isnt right

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.