Synthetic diamonds can be manufactured at pressures of 6.00x 104 atm. If we took 2.00 litres of gas at 1.00 atm and compressed it to a pressure of 6.00x104 atm, what would the volume of that gas be?
P1V1 = P2V2
Plug in the numbers and solve. Post your work if you need more help or explain fully what you don't understand about substitution.