1.33*10^ 23 molecules of carbon dioxide to moles
1 answer:
Answer:
0.22moles of carbon dioxide
Explanation:
Given parameters:
Number of molecules of carbon dioxide = 1.33 x 10²³molecules
Unknown:
Number of moles = ?
Solution:
To solve this problem, we use the relationship below:
1 mole of a substance contains 6.02 x 10²³moleccules;
So;
1.33 x 10²³molecules will contain = 0.22moles of carbon dioxide
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Answer:
Option 3. The catalyst does not affect the enthalpy change () of a reaction.
Explanation:
As its name suggests, the enthalpy change of a reaction () is the difference between the enthalpy of the products and the reactants.
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In effect, a catalyst reduces the activation energy of the reaction in both directions. The reactants and products of the reaction won't change. As a result, the difference in their enthalpies won't change, either. That's the same as saying that the enthalpy change of the reaction would stay the same.
Refer to an energy profile diagram. Enthalpy change of the reaction measures the difference between the two horizontal sections. Indeed, the catalyst lowered the height of the peak. However, that did not change the height of each horizontal section or the difference between them. Hence, the enthalpy change of the reaction stayed the same.
