Dinitrogen tetroxide decomposes to produce nitrogen dioxide gas. When dinitrogen tetroxide is sealed in an evacuated glass conta
iner, the closed system eventually reaches dynamic equilibrium. Which statement describes the graph of the rate of the forward reaction over time? It starts high and gradually decreases until it levels out above zero. It starts high and gradually decreases until it reaches a rate of zero. It starts low and gradually increases until it levels out at a rate above zero. It starts low and gradually increases until it reaches a maximum rate.
1 answer:
The formula for Dinitrogen tetroxide is N₂O₄ while that of Nitrogen Dioxide is NO₂. The balance reaction is
N₂O₄ ⇄ 2 NO₂
The reaction is actually an equilibrium reaction, but the forward reaction is the spontaneous one. In this decompostion reaction, the reactant is N₂O₄. At the start of the reaction, there is an abundant amount of reactant and zero moles of product. As time goes by, the reactant is slowly converted to NO₂. So, you would expect that at the start the forward reaction has a very fast rate. As time goes by, the amount of reactant will deplete so the rate slowly decreases until it levels to zero. If you graph it in a qualitative curve, it would look like that in the picture.
The answer is: <span>It starts high and gradually decreases until it reaches a rate of zero.</span>
N₂O₄ ⇄ 2 NO₂
The reaction is actually an equilibrium reaction, but the forward reaction is the spontaneous one. In this decompostion reaction, the reactant is N₂O₄. At the start of the reaction, there is an abundant amount of reactant and zero moles of product. As time goes by, the reactant is slowly converted to NO₂. So, you would expect that at the start the forward reaction has a very fast rate. As time goes by, the amount of reactant will deplete so the rate slowly decreases until it levels to zero. If you graph it in a qualitative curve, it would look like that in the picture.
The answer is: <span>It starts high and gradually decreases until it reaches a rate of zero.</span>
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Explanation:
Atomic number is defined as the number of an element which represents total number of protons.
When an atom is neutral then it means it contains same number of protons and electrons.
On the other hand, atomic mass is defined as the sum of total number of protons and neutrons present in an atom.
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For example, and
are isotopes of hydrogen and they have same number of protons but different number of neutrons.
Thus, we can conclude that number of neutrons can vary without changing the identity of the element.