Question

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?

Answer 1

2 lithium atoms and 2 Bromide atoms

Step-by-step 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.