At a fixed temperature and pressure, the volume occupied by a gas is proportional to the number of moles of gas present. For ideal gases under these conditions, equal of gas contain equal numbers of particles or moles.

i'm assuming that the correct answer is indeed the first one/ "a"..

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.

distance, luminosity, brightness, radius, chemical composition, and temperature

b) nuclear ive learned that in a pedtrodic table