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3 November, 04:19

Consider the generic reaction between reactants A and B:

3A+4B→2C

If a reaction vessel initially contains 9 mol A and 4 mol B, how many moles of A will be in the reaction vessel once the reactants have reacted as much as possible? (Assume 100% actual yield.)

How many moles of B will be in the reaction vessel once the reactants have reacted as much as possible? (Assume 100% actual yield.)

How many moles of C will be in the reaction vessel once the reactants have reacted as much as possible? (Assume 100% actual yield.)

Express your answer using two significant figures.

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Answers (1)
  1. 3 November, 04:48
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    Reaction:

    3A+4B→2C

    Stoichiometrial proportions:

    3A : 4B : 2C

    initial quantities:

    9 mol A and 4 mol B.

    actual ratio, 9A / 4B > theoretical ratio 3A/4B = > A is in excess and B is the limiting reagent.

    Initial moles Consumed moles produced moles Final moles

    A 9 3 0 9 - 3 = 6

    B 4 4 0 4 - 4 = 0

    C 0 0 2 2

    That table contains all the answers:

    1) how many moles of A will be in the reaction vessel once the reactants have reacted as much as possible? (Assume 100% actual yield.)

    6.0 moles

    2) How many moles of B will be in the reaction vessel once the reactants have reacted as much as possible? (Assume 100% actual yield.)

    0.0 moles

    3) How many moles of C will be in the reaction vessel once the reactants have reacted as much as possible? (Assume 100% actual yield.)

    2.0 moles
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