Why do you think it is important to understand the Environment

The ecosystem all the communities of living organisms found in a specific place, their habitats and their interactions in which we live provides natural services for humans and all other species that are essential to our health, quality of life and survival.

Explanation:

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.

its first and third is your answer i did the qustion the fourth isnt right