a certain volume of gas dissolve through a porous partition in 25 seconds calculate the time required for the same hydrogen chloride gas to diffuse under the same condition (H is equals to 1, Cl equal to 35.5 ).​

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.

im doing test rn im going with 2 but ill give answer if itss wrong,   : )