Identify the coefficients of the following equation? underline ( )Al+underline ( )HClarrow underline ( )H_(2)+underline ( )AlCl_(3) (4,12,3,4) it is already balanced (2,6,3,2) (2,1,4,5)

To identify the coefficients of the balanced 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 />The given equation is:<br />$Al + HCl \rightarrow H_{2} + AlCl_{3}$<br /><br />To balance the equation, we need to find the coefficients that make the number of atoms of each element equal on both sides.<br /><br />Let's start by balancing the aluminum atoms:<br />$2Al + HCl \rightarrow H_{2} + 2AlCl_{3}$<br /><br />Now, let's balance the chlorine atoms:<br />$2Al + 6HCl \rightarrow 3H_{2} + 2AlCl_{3}$<br /><br />The balanced equation is:<br />$2Al + 6HCl \rightarrow 3H_{2} + 2AlCl_{3}$<br /><br />Therefore, the coefficients of the balanced equation are:<br />$(2, 6, 3, 2)$<br /><br />So, the correct answer is:<br />$(2, 6, 3, 2)$