Answer:

Explanation:
Hello,
This types of reactions are likely to be carried out in gaseous phase as it is easier to induce reactions, therefore, for us to compute the change in the enthalpy of this reaction we should write the formation enthalpy of gaseous methanol, hydrogen chloride, methyl chloride and water as -205.1, -92.3, -83.68 and -241.8 kJ/mol respectively. Then, the reaction enthalpy for this reaction is:

Which accounts for an exothermic chemical reaction.
Regards.
Answer:
Empirical formula is CH₃.
Explanation:
Given data:
Mass of carbon = 120 g
Mass of hydrogen = 30.3 g
Empirical formula = ?
Solution:
Number of gram atoms of C = 120 g / 12 g/mol = 10
Number of gram atoms of H = 30.3 g / 1.008 g/mol = 30.06
Atomic ratio:
C : H
10/10 : 30.06/10
1 : 3.06
C : H = 1 : 3
Empirical formula is CH₃.
In the endpoint when the indicator changes color it gives the information that the acid is neutralized by the base.
<h3>What is Titration ? </h3>
Titration is also known as titrimetry is a technique where a solution of known concentration is used to calculate the concentration of the unknown solution. Titration is a laboratory technique.
<h3 /><h3>What is Endpoint ? </h3>
The point at which the indicator changes the color is known as Endpoint.
Thus from the above conclusion we can say that In the endpoint when the indicator changes color it gives the information that the acid is neutralized by the base.
Learn more about the Titration here: brainly.com/question/186765
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On #4 RR should be on top and rr on the side. Then Rr should be in every box