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All chemical changes are accompaniedby chemical reactions. These réactionsare described in sentence from withthe help of chemical equations in the term of symbol and formula of the substance involved. initially the equation is in skeletal form which isthen balanced so thatof the totalnumber the reactantspecies isis the same as that ofthe product species. .Why should a chemicael equation by balanced?Can a chemical formula be changed duringthe balancing of the equations?Why are some chemical reactionsexothermic while some other areendothermicnature?why should a chemical equationbe made malecular ? |
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Answer» Answer: 1- A chemical EQUATION should be balanced to satisfy law of conservation of mass.The total NUMBER of atoms in reactant must be equal to the total number of atoms in product 2- No , chemical formula do not changes during balancing equations , only the number of molecules of that particular compound changes. 3- A reaction is exothermic , if it evolves heat during the reaction and the reaction is called endothermic if the reaction absorbs or utilises the heat 4-Since not all elements have enough electrons to fill their outermost shells, atoms form chemical bonds with other atoms thereby obtaining the electrons they NEED to ATTAIN a stable electron configuration.Thus a chemical equation be MADE molecular |
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