How many moles of boron
(B, 10.81 g/mol) are in 37.8
grams of boron?
[?] moles

37.8g/ 10.81g/mol = 3.4968...moles

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.

the answer would be b i believe