Question

Based on the following chemical equation 2H2 + O2-->2H2O how many molecules of O2 willl be required to produce 1.60 moles of water.

Answer 1

first you have to find how many moles of O2 you would need.

in order to do this, build a ratio using the moles and the stoichiometric coefficients

\[\frac{ n _{o _{2}} }{ 1 }=\frac{ n _{H _{2}O} }{ 2 }\]

Answer 2

then multiply the amount of moles of oxygen by avogadros number, 6.023*10^23