fix grammar

Nevertheless, as the reaction did not go to completion, certain calculation was undeniable thus justifying the research question was not the most accurate.

Nevertheless, as the reaction did not go to completion, certain calculations were undeniable, thus justifying that the research question was not the most accurate.

To fix the grammar in the sentence, you can make the following changes:

"Nevertheless, since the reaction did not go to completion, certain calculations were undeniable, thereby justifying that the research question was not the most accurate."