Aluminum does not corrode in the same manner as iron does, because aluminum is harder to oxidize than iron. aluminum does not react with oxygen gas. a protective layer of aluminum oxide forms on the metal surface. iron gives cathodic protection to aluminum. the electrical circuit cannot be completed on an aluminum surface.

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

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.