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29 September, 20:56

6. Given the following incomplete reaction:

CaBr2 + 2Li → Ca +

List the elements (including how many of each element) that would have to be present in the

compound represented by the blank in order to demonstrate conservation of mass?

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Answers (1)
  1. 29 September, 21:14
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    2 lithium atoms and 2 Bromide atoms

    Explanation:

    The complete equation for the reaction is;

    CaBr₂ + 2Li → Ca + 2LiBr

    It is an example of a displacement reaction where a reactive metal displaces a less reactive metal from its compound. According to the law of conservation of mass, the mass of reactants should be equal to the mass of the reactants. The law of conservation of mass is achieved by balancing an equation to make sure the number of atoms is equal on either side of the equation. In our case, the blank will have 2 lithium atoms, 2 Bromine atoms to demonstrate the law of conservation of mass.
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