Question

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Directions: Given the balanced chemical equations in the following scenarios, compute for the total mass of the reactants and the total mass of the products.

Guide questions:

1. Compare the total mass of the reactants and the total mass of the products.

2. Do all of the chemical reactions given above conformed the Law of Conservation of Mass? 35

3. What does the mass of the reactants and products tell us about the Law of Conservation of Mass? Why?

4. State the law of conservation of mass.

REFLECTION:
We commonly encounter chemical reactions in daily life such as fire and biological metabolism. Cite at least two (2) examples of real-life situations that involve the Law of conservation of mass and explain how these affects you.​

Answer 1

Detailed Explanation:

1) Rusting of Iron

4Fe + 3O2 + 2H2O -> 2Fe2O32H2O

Reactants :-
Fe = 4
O = 3 * 2 + 2 = 8
H = 2 * 2 = 4

Products :-
Fe = 2 * 2 = 4
O = 2 * 3 + 2 = 8
H = 2 * 2 = 4

2) Fermentation of sucrose…

C12H22O11 + H2O -> 4C2H5OH + 4CO2

Reactants :-
C = 12
H = 22 + 2 = 24
O = 11 + 1 = 12

Products :-
C = 4 * 2 + 4 = 12
H = 4 * 5 + 4 = 24
O = 4 * 2 + 4 = 12

Looking closely at the way I have taken the total number of elements on the reactants and products side, you can solve the rest.

All the Best!

Answer 2

Answers of guide questions :

Answer 1 : Total mass of the reactants and total mass of the products is equal.

Answer 2 : Yes , all of the chemical reactions given above conformed the Law of Conservation of Mass because total mass of the reactants and total mass of the products is equal.

Answer 4 : Law of Conservation of Mass states that mass can neither be created nor destroyed it always remains constant.

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