How Well Do You Pay Attention?

Explanation
Miss Theobald's favorite compound is water because water is a vital and essential compound for all living organisms. It is necessary for hydration, maintaining bodily functions, and is a universal solvent. Water is also involved in various chemical reactions and is a key component in many biological processes. Additionally, water has numerous physical properties that make it unique and important, such as its high boiling and freezing points, surface tension, and ability to dissolve many substances.

Explanation
The given answer suggests that Miss Theobald's most commonly made mistake is spelling. This implies that she frequently makes errors in the way she writes words. It is possible that she misspells words in her written work or makes spelling mistakes while communicating verbally. This could be a significant issue as spelling errors can lead to misunderstandings and a lack of clarity in her communication.

Explanation
Miss Theobald's favorite branch of chemistry is hydrocarbons because it is specifically mentioned as one of the options and the answer is based on the given information.

Explanation
Miss Theobald's least favourite branch of chemistry is the Chemistry of Water. This can be inferred from the word "least favourite," which implies that Miss Theobald has a dislike or aversion towards this branch. The other options, Stoichiometry, Hydrocarbons, and Bonding, are not mentioned in the question and therefore cannot be determined as her least favourite branch.

Explanation
Miss Theobald's least favourite thing to play with is a strong acid because it can be dangerous and corrosive. Strong acids have the ability to cause harm to living organisms and damage materials. They can cause burns, respiratory problems, and other health issues. Miss Theobald may prefer to avoid playing with strong acids to ensure her safety and the safety of others.