If you were given three unlabeled bottles of chemicals and told that one contains Na2CO3, one contains NaCl, and one contains LiCl. How could you determine the contents of each
bottle? Hint: Remember procedures from prior experiments.

i think it is true since you can test the answer and can use observations to complete it.

hcl + naoh → h2o + nacl

explanation:

hcl + naoh → h2o + nacl   is the reaction that is correctly balanced.

however, pcl3 + h2 → ph3 +3hcl, 2ca+ 3cl2 → cacl3, and c5h12 + 5o2 → 5co2 + 6h2o are not correctly balanced.