A zinc-copper cell is constructed: Zn | Zn2+(1M) | Cu. What occurs to the mass of the copper electrode as the reaction proceeds? (Zinc is above copper in the activity series of metals.) It increases
It decreases
Cannot be determined
It remains the same

the millers tale is the answer.

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.

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.