Acid rain is precipitation that has become acidic over time. It is caused by pollution from human activities. Acid rain is harmful to aquatic environments and forests. Which of these could be used to determine the amount of acid rain that might occur in the hydrologic cycle of an area? A. A device that measures the amount of chemicals released into the air by a factory. B. A device that measures the concentration of pollutants in a specific area of the ocean.
C. A tool that identifies the types of trash entering bodies of water.
D. A tool that identifies the types of chemicals that transpire from plants.

answer A makes the most sense

Explanation:

it's the only one the describes measuring the acid in the air from a factory (humans) I may be wrong tho

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.