2.3 moles
Explanation:
From the question given, we obtained the following data:
Mass of CH4 = 38g
Molar Mass of CH4 = 12 +(4x1) = 12 + 4 = 16g/mol
Number of mole =?
Number of mole = Mass /Molar Mass
Number of mole CH4 = 38/16 = 2.3mol