A mixture of krypton and methane gases contains krypton at a partial pressure of 471 mm Hg and methane at a partial pressure of 263 mm Hg. What is the mole fraction of each gas in the mixture

The answer should be vaporization 

Ibelieve it is b. proton.hope my answer has you : )

The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance.