Mole Concept And Molar Masses

Step 1: Number of electrons in methane.
In methane (CH ), carbon (C) has 6 electrons, and hydrogen (H) has 1 electron. Since there are 4 hydrogen atoms, the total number of electrons in one molecule of methane is:

Step 2: Number of electrons in one mole of methane.
One mole of methane (CH ) contains molecules (Avogadro's number). Therefore, the total number of electrons in one mole of methane is:

Step 3: Conclusion.
Thus, the number of electrons in one mole of methane is .

Final Answer: (B)