You can practise without an account, but mistakes are only saved after you log in. Log in
Question 1 of 7
A steel cylinder of fixed volume holds a gas (treated as ideal) at 1.2×107Pa. After some gas is used, the pressure measured at the original temperature is 9.0×106Pa. The mass of gas used, as a fraction of the original mass, is ( ).
Submit your answer to see whether it is right and the explanation here.