Question

please help me with the question in the picture ​

Answer 1

Answer:

4. Quick lime (Calcium Oxide) Reacts with water to form Calcium Hydroxide (Slaked lime)

5. 2Mg + O2 ---> 2MgO

6. BaCl2 (Aqueous) + Na2SO4 (Aqueous) ----> BaSO4 (Precipitate) + NaCl

7. Chemical reactions must be balanced so it follows Law of Conservation of Mass.

It also helps in predicting amount of reactants needed incase there is a Limiting reagent.

Explanation:

4. The first one is basically hardening.

5. Most combination reactions are good examples.

6. Barium and Na are swapping it's places and A precipitate is also formed as product.

7. Read the answer.