The interaction between the substances and stomata is a chemical reaction, light energy strikes at the chlorophyll molecules, whose electrons gets excited to a state of higher energy, and they come back to their state of lower energy by emission of energy, which is accepted by a chain of acceptors, and energy is generated.
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Answer:</h3>
12 moles
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Explanation:</h3>
The equation for the reaction;
CuO(s) + H₂(g) → Cu(s) + H₂O(g)
We are given;
- Moles of copper, Cu is 12 moles
We are required to calculate the number of moles of CuO required;
- From the reaction 1 mole of CuO reacts to produce 1 mole of copper
- Thus, the mole ratio of CuO to Cu is 1 : 1
- Moles of CuO = Moles of Cu
Thus, moles of CuO = 12 moles
Therefore; 12 moles of CuO will be required.
Base on the problem given, it shows that the rate law for this reaction is directly proportional. The relationship between the reactants Z and Y that is proportional to the cube of [Z], it shows the concentrations of reactants is expressed by the rate law.
Answer : The change in enthalpy for the following chemical reaction is, -90 kJ
Explanation :
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The given main reaction is,
The intermediate balanced chemical reaction will be,
(1)
(2)
(3)
Now we will reverse the reaction 2 and then adding all the equations, we get :
(1)
(2)
(3)
The expression for enthalpy of change will be,
Therefore, the change in enthalpy for the following chemical reaction is, -90 kJ
The mean whether is solid, liquid, gas, or plasma.<span>
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