posted by Billy .
How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?
Write the equation and balance it.
You can take a shortcut and use L as mols in an all gaseous equation.
Use the coefficients in the balanced equation to convert L HCl to L O2.
L O2 = L HCl x (?mol O2/?mol HCl) = ?