Compare the amount of heat required to vaporize a 200.-gram sample of h2o(ℓ) at its boiling point to the amount of heat required to melt a 200.-gram sample of h2o(s) at its melting point.

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.

pie chart because it is in percents ( % )