객관식
Which device disperses oxygen by using an air pump to the plants through a diffuser or air stone?
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7. Gases
Gas Stoichiometry
객관식
In a gas stoichiometry experiment, you performed the reaction using air instead of pure oxygen. How would this choice most likely affect the amount of product formed compared to using pure oxygen?
A
The amount of product would remain the same because air and pure oxygen have the same oxygen content.
B
The amount of product would decrease because air contains more carbon dioxide than pure oxygen.
C
The amount of product would decrease because air contains less oxygen than pure oxygen.
D
The amount of product would increase because air contains nitrogen that reacts to form more product.
검증된 단계별 안내1
Understand the composition of air versus pure oxygen: Air is approximately 21% oxygen and 78% nitrogen, while pure oxygen is 100% oxygen.
Recall that in a reaction where oxygen is a reactant, the amount of product formed depends on the amount of oxygen available to react.
Since air contains less oxygen per volume compared to pure oxygen, using air means fewer moles of oxygen are available for the reaction.
With less oxygen available, the reaction will be limited by the oxygen amount, leading to a decrease in the amount of product formed compared to using pure oxygen.
Note that nitrogen in air is mostly inert under typical reaction conditions and does not contribute to product formation, so it does not increase the product amount.
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