Answer:
The concentration of [ H3O^+] is 1.6 × 10^−7.
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If we read the complete exercise, we can understand that the correct answer is 9 students.
This is a math related exercise.
If we take into consideration that Sean is the 5th highest in the class, it means that there are four more people before him.
However, he is also the 5th lowest mark in the class, so it means that there are four more people below him.
If we also count Sean, there are:
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The word 'recalcitrant' has a Latin origin<em> </em>(<em>calcitrare</em>) and was originally used for describing "to kick" actions.
<h3>What does recalcitrant mean?</h3>
Recalcitrant is a word derived from <em>calcitrare</em><em> </em>(Latin) and originally used for indicating "to kick" actions.
A person considered 'recalcitrant' is someone who is obstinately defiant of authorities and/or social restraints.
Two synonyms of this word (recalcitrant) may be ungovernable and insubordinate, whereas two antonyms include docile and subordinate.
Learn more about the meaning of recalcitrant here:
brainly.com/question/3323996
Vivimos is the correct answer... I think I hope it's not wrong