[laxplayer]

The problem states :
Chlorine and oxygen gases react to form chlorine dioxide gas.

Cl2(g) + 2 O2(g)-->2 ClO2(g)
At a certain temperature and pressure 0.70 L of Cl2 reacts with 1.4 L of O2. If all the Cl2 and O2 are consumed, what volume of ClO2, at the same temperature and pressure, will be produced?

I am pretty sure you use Avogadro's law, V=K1n, to do this, but I don't know how to apply that.

[Borek]

Volumes are in the same ratio as moles - as given by the stoichiometric coefficients in the reaction equation. 1.4:0.7 = 2:1...

[laxplayer]

so it would be 1.4 L?

[Borek]

Right on target