2. Which reaction is not a correctly balanced single replacement reaction? 2Al+3CuCl_(2)arrow 2AlCl_(3)+3Cu 2C_(2)H_(6)+7O_(2)-4CO_(2)+6H_(2)O 3Ca+2FeBr_(3)-3CaBr_(2)+2Fe 2LiCl+F_(2)arrow 2LiF+Cl_(2)

The reaction that is not correctly balanced is: The correct balanced equation should be: In a correctly balanced single replacement reaction, the number of atoms of each element must be the same on both sides of the equation. In the given reaction, the number of oxygen atoms is not balanced, with 7 oxygen atoms on the left side and only 4 on the right side.