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3 February, 10:43

Which of the following combinations of reactants will result in a synthesis reaction? A. Li + HCl B. Al + O2 C. Ca + H2O D. F2 + HCl

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  1. 3 February, 12:26
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    The answer is B. Al + O2.

    In a synthetic reaction, two (or more) compounds combine and form one complex product. It can be expressed as:

    A + B → AB

    So, let's go through all of the reactions:

    A. 2Li + 2HCl → 2LiCl + H₂

    B. 4Al + 3O₂ → 2Al₂O₃

    C. Ca + 2H₂O → Ca (OH) ₂ + H₂

    D. F₂ + 2HCl → 2HF + Cl₂

    So, in all of these reactions, there are two products except in the choice B, where only one product. So, the example of synthesis reaction is: 4Al + 3O₂ → 2Al₂O₃.
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