what is the missing coefficient to make a balanced equation? ?na + cl₂ → nacl be sure the equation is…

what is the missing coefficient to make a balanced equation? ?na + cl₂ → nacl be sure the equation is balanced before entering the coefficients. 4 1 2 7
Answer
Explanation:
Step1: Balance chlorine atoms
There are 2 chlorine atoms in $Cl_2$. So, to balance the chlorine atoms in $NaCl$, the coefficient of $NaCl$ should be 2. $Na + Cl_2\rightarrow2NaCl$
Step2: Balance sodium atoms
Since there are 2 sodium atoms in $2NaCl$, the coefficient of $Na$ should be 2. $2Na + Cl_2\rightarrow2NaCl$
Answer:
2