Find out the total number of electrons present in 3.2 g methane?

Step-by-step solution

The total number of electrons is determined by calculating the number of molecules and multiplying by the electrons per molecule. The molar mass of methane (C H₄ ) is 12 + 4 1 = 16 g/mol. The number of moles in 3.2 g is 3.2 / 16 = 0.2 mol. Using Avogadro's number, the number of molecules is 0.2 6.022 10²³ = 1.2044 10²³ . Each methane molecule has 6 + 4 = 10 electrons, so the total number is 1.2044 10²³ 10 = 1.2044 10²⁴ . This value corresponds to option B .