Answer: There are approximately 4.095 x 10^24 oxygen atoms in 3.4 moles of silicon dioxide (SiO2).
Explanation: Hii lol ever heard of bing chat AI? It helps a lot for me :) And its much faster than this... Anyays its calculated by multiplyingthe number of molecules of the substance by the number of oxygen atoms in one molecule which in this case is SiO2 :)