2. Using Tables 5 and 6 below, balance the following chemical reaction: Na2CO3 (aq)+CaCl2 (aq) → CaCO3 (s)+NaCl (aq)

Na₂CO₃  +  CaCl₂  →  CaCO₃  +  2 NaCl

Explanation:

Na₂CO₃  +  CaCl₂  →  CaCO₃  +  NaCl

First, determine what is balanced.  

Ca and CO₃ is balanced; there is one on each side.  

Na and Cl aren't balanced.  On one side, there is two of each, while on the other there is only one.  To fix this add a 2 in front of NaCl.  This will cause the equation to be balanced.

Na₂CO₃  +  CaCl₂  →  CaCO₃  +  2 NaCl

the answers would be

the first one and the second one

the answer is 75.0%.