A metal cylinder contains 1 mol of nitrogen gas at STP. What will happen to the pressure if

another mole of gas is added to the cylinder but the temperature does not change?

Then pressure will double

Explanation:

PV = nRT

P = nRT / V

If all other variables are kept constant, P will be proportional to n i. e

P1 / n1 = P2 / n2

n = 1

P1 = P

n2 = 2

P2 = ?

P1 / n1 = P2 / n2

P / 1 = P2/2

Cross multiply

P2 = 2P

Therefore, if an additional 1mole of the gas is added, the pressure will double