Question #d90e9

1 Answer
Feb 29, 2016

Answer:

#1.5*10^23# molecules

Explanation:

.25 mol O #(6.022 * 10^23)/(1 mol O)# = #1.5*10^23# molucules

When asked to find the number of molecules of any element, you multiply the number of moles by Avogadro's number, #6.022 * 10^23#.