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german
3 years ago
14

A catalyst decreases the activation energy of a particular exothermic reaction by 34 kJ/mol, to 57 kJ/mol. Assuming that the mec

hanism has only one step, and that the products are 26 kJ lower in energy than the reactants, sketch approximate energy-level diagrams for the catalyzed and uncatalyzed reactions. What is the activation energy for the uncatalyzed reverse reaction?

Chemistry
1 answer:
vagabundo [1.1K]3 years ago
4 0

Answer:

the activation energy for the uncatalyzed reverse reaction is 83kJ/mol

Explanation:

see the attached file

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Answer:

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Determine how many millilitres of a 4.25 M HCl solution are needed to react completely with 8.75 g CaCO3?
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Answer:

41 mL

Explanation:

Given data:

Milliliter of HCl required = ?

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Solution:

Chemical equation:

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Number of moles of CaCO₃:

Number of moles = mass/molar mass

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Number of moles = 0.087 g /mol

Now we will compare the moles of  CaCO₃ with HCl.

                      CaCO₃         :          HCl

                          1               :            2

                      0.087           :         2/1×0.087 = 0.174 mol

Volume of HCl:

Molarity = number of moles / volume in L

4.25 M = 0.174 mol / volume in L

Volume in L = 0.174 mol /4.25 M

Volume in L = 0.041 L

Volume in mL:

0.041 L×1000 mL/ 1L

41 mL

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