6. What are formed from the chemical reaction of the substances given below? Write the balanced chemical reaction as well.
a) When carbon burns in air
b) When calcium carbonate is heated
c) When a piece of burning magnesium ribbon is inserted in the
jar filled with oxygen gas.
d) When hydrogen peroxide gets dissociated in the presence of
manganese dioxide.
e) When
chemical reaction between calcium carbonate
and hydrochloric acid takes place.

1) CO2

2) CO2 and CaO

3) MgO

4) H20 and O2

5) CaCl2, CO2, H2O

Explanation:

Now let us try to put down the reactions here;

1) C(s) + O2(g) > CO2(g)

2) CaCO3(s) > CaO(s) + CO2 (g)

3) 2Mg(s) + O2(g)> 2MgO

4) 2H2O2(aq) > 2H2O(l) + O2(g)

5) CaCO3(s) + 2HCl(aq) > CaCl2(aq) + CO2(g) + H2O(l)

Note that a chemical reaction equation is only said to be balanced when the number of atoms of each element on both sides of the reaction equation are exactly the same.