Balance this equation. underline ( )CF_(4)+underline ( )Br_(2)-underline ( )CBr_(4)+underline ( )F_(2) 1.2.1.2 1.2.2.1 2,2,2,2 2,1,2,1

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 />Step 1: Count the number of atoms of each element on both sides of the equation.<br />On the left side:<br />- C: 1<br />- F: 4<br />- Br: 2<br /><br />On the right side:<br />- C: 1<br />- Br: 4<br />- F: 2<br /><br />Step 2: Balance the atoms of each element by adjusting the coefficients.<br />To balance the carbon atoms, we need to have 1 CF4 molecule on the left side.<br />To balance the bromine atoms, we need to have 2 Br2 molecules on the left side.<br />To balance the fluorine atoms, we need to have 2 F2 molecules on the right side.<br /><br />Balanced equation: CF4 + 2 Br2 → CBr4 + 2 F2<br /><br />Therefore, the correct answer is 1, 2, 2, 1.