How much charged is required to reduced 2 moles of cr6+ to cr3+

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.

i believe the answer is three water molecules