Question

If 30.0 L of oxygen are cooled from 200ºC to 1°C at constant pressure, what is the new volume of oxygen? (Can you pls show the steps)

Answer 1

Volume and temperature, if we heat the gas particles, they move more rapidly gas expands!. this means they have a directly proportional relationship at constant number of moles and pressure.
use Charles Law
V1/V2=T1/T2

Answer 2

Directly proportional relationships means that when volume is decreases temperature is cooled and when the temperature increases volume expands.
30.00/V2=200/1
V2*200=30.00*1
V2=30.00/200.00