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5ocm³ of hydrogen peroxide, which has a concentration of 2.0mol/dm³ is decomposed 2h₂o₂=2h₂o+o₂ how many moles of hydrogen peroxide are there in 50 cm³ of solution containing 2.0mol 2.how many moles of oxygen are formed when 50cm³of hydrogen peroxide is decomposed
Accepted Answer
Here's the breakdown of the calculation:
1. Moles of Hydrogen Peroxide:
Convert cm³ to dm³: 50 cm³ = 0.05 dm³
Use the formula: moles = concentration x volume
Moles of H₂O₂ = 2.0 mol/dm³ x 0.05 dm³ = 0.1 moles
2. Moles of Oxygen:
The balanced equation shows that 2 moles of H₂O₂ decompose to produce 1 mole of O₂.
Therefore, 0.1 moles of H₂O₂ will produce (0.1 moles H₂O₂ / 2) x 1 mole O₂ = 0.05 moles of O₂.
Answer:
There are 0.1 moles of hydrogen peroxide in the solution.
0.05 moles of oxygen are formed when 50 cm³ of hydrogen peroxide decomposes.
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