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101.

C2H4 + xO2 -> 2CO2 + yH2O, what is the value of x + y?(a) 2(b) 3(c) 5(d) 8The question was posed to me during an online interview.This is a very interesting question from Stoichiometry in chapter The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

Answer»

The correct option is (C) 5

The best explanation: The balance combustion EQUATION is C2H4 + 3O2 -> 2CO2 + 2H2O, => X = 3, y = 2, => x + y = 5.
Discussion
102.

wC3H7O4 + xO2 -> yCO2 + zH2O, what is the value of w + x + y + z?(a) 21(b) 35(c) 41(d) 47The question was asked during an interview.The origin of the question is Stoichiometry topic in portion The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

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Right answer is (c) 41

For explanation: The BALANCED CHEMICAL reaction is: 4C3H7O4 + 11O2 -> 12CO2 + 14H2O, => W + x + y + z = 41.
Discussion
103.

Which of the following does stoichiometry of a reaction is all about?(a) Extent of reaction(b) Heat of reaction(c) Amount of reactants and products(d) None of the mentionedThis question was posed to me during an interview for a job.The doubt is from Stoichiometry topic in chapter The Chemical Reaction Equation & Stoichometry, Material Balances for Processes Involving Reaction and Multiple Units of Basic Chemical Engineering

Answer»

The correct CHOICE is (C) Amount of reactants and products

The best EXPLANATION: By DEFINITION, Stoichiometry relates the amount of reactants and products in a reaction.
Discussion