Consider the following chemical equation:

2NO2-->N2O4
If 25.0mL of NO2 gas is completely converted to N2O4 gas under the same conditions, what volume will the N2O4 occupy?

3 answers

When gases only are involved in a reaction, one can dispense with converting to moles and go directly with the volume.
25.0 mL x (1 mole N2O4/2 moles NO2) = 25.0 mL x 1/2 = ??

12.5 L

0.0125 L or 12.5 mL

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