Hydrogen peroxide, $\text{H}_2\text{O}_2$, breaks down into water and oxygen when an appropriate catalyst is introduced. $20.0\,\text{cm}^3$ of aqueous hydrogen peroxide decomposes and gives $600\,\text{cm}^3$ of oxygen under room conditions. What is the concentration of the aqueous hydrogen peroxide?
- A$5.00\,\text{mol dm}^{-3}$
- B$2.50\,\text{mol dm}^{-3}$
- C$1.25\,\text{mol dm}^{-3}$
- D$0.625\,\text{mol dm}^{-3}$