How does a balanced chemical equation show that mass is never lost or gained in a chemical reaction?

Answer 1

Because the Balanced equation can correctly add the reactants and it will equal the sum of the products.
If a chemical equation is balanced correctly, there will be the same number of each element on both sides. Since each element has a given and known mass, the total mass on each side of the balanced equation must be equal.

Answer 2

In a balanced equation, when the masses of the elements on the products side of the reaction are added up, they equal the sum of the masses of the reactants. This shows that mass is never gained or lost.

Answer 3

In a balanced chemical equation, the total number of each kind of atoms for which an atomic symbol is present in the equation is the same for the products as for the reactants. Since the average mass of each kind of atoms is constant, this means that the total mass is also the same on both sides of the equation.

Answer 4

if you balanced the equation correctly then the sum of the reactants will equal the sum of the the products because if there is the same amount of atoms on the reactants and the products obviously none is lost.

Answer 5

Convert the moles of each constituent in the balanced chemical reaction equation to mass of that constituent. The sum of the reactants' masses must equal the sum of the products' masses.

For example, consider the complete combustion of propane :

C3H8 + 5 O2 ----> 3 CO2 + 4 H2O ....[ mole basis ]

(44) ( 1 ) C3H8 + ( 32 ) ( 5 ) O2 -----> ( 44 ) ( 3 ) CO2 + ( 18 ) (4 ) H2O

44 g C3H8 + 160 g O2 ---> 132 g CO2 + 72 g H2O

SUM ( Reactants ) = 44 g + 160 g = 204 g

SUM ( Products ) = 132 g + 72 g = 204 g

SUM ( Reactants ) = SUM ( Products ) = 204 g -----> [ OK!]

Answer 6

because if there is the same amount of atoms on the reactants and the products obviously none is lost

Answer 7

a balanced equation illustrates mass is never lost or gained by just being rearrange

Answer 8

Because the number (and type) of atoms on either side of the equation are the same, it is only their arrangement that is different.