Balance this equation. underline ( )CF_(4)+underline ( )Br_(2)-underline ( )CBr_(4)+underline ( )F_(2) 2.1.2,1 1,2,1,2 2,2,2,2 1,2,2,1

To balance the chemical equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation.<br /><br />Given equation: CF4 + Br2 → CBr4 + F2<br /><br />Let's balance the equation step by step:<br /><br />1. Balance the carbon atoms:<br /> - There is 1 carbon atom on both sides of the equation, so the carbon atoms are already balanced.<br /><br />2. Balance the fluorine atoms:<br /> - There are 4 fluorine atoms on the left side (in CF4) and 2 fluorine atoms on the right side (in F2).<br /> - To balance the fluorine atoms, we need to multiply the F2 molecule by 2.<br /><br />3. Balance the bromine atoms:<br /> - There are 2 bromine atoms on the left side (in Br2) and 4 bromine atoms on the right side (in CBr4).<br /> - To balance the bromine atoms, we need to multiply the Br2 molecule by 2.<br /><br />The balanced equation is:<br />CF4 + 2Br2 → CBr4 + 2F2<br /><br />Therefore, the correct answer is 1, 2, 1, 2.