> Molecules to moles, Avogadro number CO2? 10 PTS BEST ANSWER?

Molecules to moles, Avogadro number CO2? 10 PTS BEST ANSWER?

Posted at: 2014-06-09 
Can someone walk me through this? Thanks. A sealed flask contains 1.3 x 10^25 molecules of CO2. How many moles of CO2 are in the flask?