Yes this is know as the c value. It is usually used in q=mc change in temperature
Answer:
refer to this site it has information about limiting reactant -
https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Supplemental_Modules_(Inorganic_Chemistry)/Chemical_Reactions/Limiting_Reagents
Answer:
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<span>a chemical change results in the formation of one or more new substances</span>