If the volume of 1.00 mole of gas is tripled, what will happen to the pressure, if the temperature remains constant

The new pressure becomes one third of the initial pressure.

Explanation:

The relation between pressure and volume at constant temperature is given by :

Let new pressure and volume be P' and V' respectively.

V'=3V (given)

So,

Hence, new pressure becomes one third of the initial pressure.

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

the answer is 0.42 is that is an option. this question provides no info