Question

each element towards reactant side= total mass of the same
element towards product side.
Reason: Mass can neither be created nor destroyed during
a chemical change

Answer 1

Answer:

because the reactions only takes place may cause change in odour,heat may absorbed or release or may properties of the substance change . THAT'S WHY THE TOTAL MASS OF SAME ELEMENT IN REACTANT = THE TOTAL MASS OF SAME ELEMENT IN PRODUCT SIDE

Answer 2

Explanation:

ok this is the answer down

$(x)y { {?}^{?} \times \frac{?}{?} }^{2}$

$652 \times \frac{?}{?}$