Question

how many moles are 2.60x10^21 atomas of silicon?

Answer 1

Answer:

let x moles of silicon contains 2.8×10^24 atoms. A/Q, 6.02×10^24 atoms are present in 1 mole of silicon . therefore, 2.8×10^24/6.02×10^24=4.65 moles of silicon