Number of atoms of iron present in \( 100 \mathrm{~g} \mathrm{Fe}_{2} \mathrm{O}_{3} \) having \...

Number of atoms of iron present in \( 100 \mathrm{~g} \mathrm{Fe}_{2} \mathrm{O}_{3} \) having \( 20 \% \) purity is: (A) \( 0.20 \mathrm{~N}_{\mathrm{A}} \) (B) \( 0.25 \mathrm{~N}_{\mathrm{A}} \) (C) \( 0.50 \mathrm{~N}_{\mathrm{A}} \) (D) \( 0.30 \mathrm{~N}_{\mathrm{A}} \) 📲PW App Link - https://bit.ly/YTAI_PWAP 🌐PW Website - https://www.pw.live