When iron nails rust, the mass of the nail increases. Plan and experiment to investigate if iron nails rust more quickly in tap water or distilled water. You are provided with new iron nails and common laboratory apparatus

c. 75.7

i think that is the right

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.