A vessel contains a mixture of 37.0 grams of H₂ (g) and 13.9 grams of CH₄. If the total pressure inside the vessel is measured at 3.05 atm, the partial pressure of H₂ (g) must be _____ atm.
O 2.91
O 0.138
O 58.6
O 5.87
O 56.0