SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cannot account for the energy used in the reaction.
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reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent because its quantity limits the amount of products formed.
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what happens when two substances react to produce entirely new substances.
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reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
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Detailed explanation-1: -In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limit the amount of products formed. Example: combustion of methane. CH4(g)+O2(g)→CO2(g)+2H2O(l)
Detailed explanation-2: -An excess reactant is a reactant present in an amount in excess of that required to combine with all of the limiting reactant. It follows that an excess reactant is one remaining in the reaction mixture once all the limiting reactant is consumed.
Detailed explanation-3: -Explanation: The limiting reactant is named what it is because it is what limits the chemical reaction. Since it gets used up first, it must produce the least amount of product, and adding more would allow for more of the reaction to occur.
Detailed explanation-4: -The reactant which is entirely consumed in reaction is known as limiting reagent.In the reaction 2A + 4B → 3C + 4D, when 5 moles of A react with 6 moles of B, thenA Which is the limiting reagentBCalulate the amount of C Formed.
Detailed explanation-5: -The limiting reagent in a chemical reaction is the reactant that will be consumed completely. Once there is no more of that reactant, the reaction cannot proceed. Therefor it limits the reaction from continuing. The excess reagent is the reactant that could keep reacting if the other had not been consumed.