Which of the following accounts for the fact that reactions between ions in solution are usually very fast?

○ bonds are weak

○ No covalent bonds need to be broken for reaction to occur.

○ Reactions between lons are endothermia.

○ Reactions between are exothermic.

d.) circle motion requires a force to give it a centripetal acceleration.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.