krystalhurst97
07.01.2021 •
Chemistry
Which of the following are examples of chemical energy being released or stored?
I. A car battery reacting and releasing energy
II. A girl eating a sandwich which helps her move
III. Propane burning on a barbecue
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Ответ:
5.0 moles.
Explanation:
The balanced equation of the reaction between hydrogen and oxgen to produce water is:H₂ + 1/2O₂ → H₂O.
It is clear that 1.0 mole of H₂ reacts with 0.5 mole of O₂ to produce 1.0 mole of H₂O.∴ 2.5 mole of O₂ will react with 5.0 moles of H₂.
The limiting reactant is O₂ and H₂ is found in excess (1.0 mole more).From the stichiometry: 2.5 mole of O₂ will react with 5.0 moles of H₂ to produce 5.0 moles of H₂O.
∴ 5.0 moles of water are produced when 6.0 moles of hydrogen gas react with 2.5 moles of oxygen gas