# Why Is It Important That A Chemical Equation Be Balanced

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## LEARNING TASK 1 Complete the diagram below by writing key

Ask: LEARNING TASK 1 Complete the diagram below by writing key points of chemical reaction and Law of conservation of mass. Then in the middle write the connection of these concepts. Answer the guide questions that follows. Guide questions: Law of Conservation of Mass 1.Why is balancing of chemical equations important? 2. How is it related to the Law of the Conservation of Mass? 3.Give five (5) examples of chemical reactions in you can observe in your daily life. Balancing Chemical Equation 4TH QUARTER WEEK 6 17​

mag basa ka para ma totoo ka

Explanation:

sorry I need points

## 1. Why is it necessary to know the molecular formula

Ask: 1. Why is it necessary to know the molecular formula of chemical compounds?
2. What is the importance of translating a word equation into a chemical equation? 3. Why is there a need to balance chemical equations?​

1.)It is important to remember that the molecular formula—in contrast to the simpler empirical formula that specifies only the relative number of atoms or moles present in a compound—identifies the actual number of atoms present in a molecule.

2.)

## 1. What so you call the minimum amount of energy

Ask: 1. What so you call the minimum amount of energy needed to start a chemical reaction?

a. activation energy
b. energy of the reaction
c. reaction mechanism energy
d. the entropy of reaction

2. which statement best describes the Collision theory?

a. All collisions lead to chemical reactions
b. most collisions lead to chemical reaction
c. very few reactions involve particle collisions
d. effective collisions lead to chemical reaction

3. which is/are necessary for successful collisions to occur?

I. Favourable collision geometry
II. Sufficient kinetic energy
III. Large change in enthalphy

a. I only
b. I and II only
c. II and III only
d. I, II, and III

4. which of the following will decrease the number of effective collisions during a chemical reaction?

b. Increasing the surface area
c. decreasing the temperature
d. Increasing reactant concentrations

5. which of the following will increase the reaction rate?

b. decreasing temperature
c. using lumps instead of powder
d. decreasing the concentration of an acid

6. crushing a solid into a powder will increase the reaction rate. why?

a. the particles will collide with more energy
b. the powered form has more surface area
c. the activation energy barrier will be lowered
d. the orientation of colliding particles will be removed

7. why does increasing the temperature of the reactants increase the reaction rate?

a. heat energy increases the size of the molecules of reactants, therefore the molecules react more frequently
b. heat energy helps to lower the amount of overall energy that is required for a reaction to occur
c. heat energy causes some of the reactants to evaporate, thereby increasing the concentration of the reactants
d. heat energy causes the particles of the reactant to move faster, therefore,react with each other more frequently

8. enzymes are an important component in the human body. most chemical reactions do not occur or will proceed slowly without enzymes. what are enzymes?

a. biological catalyst
b. simple elements
c. chemicals that increase the surface area
d. molecules used to increase concentration

9. how does a catalyst makes a chemical reaction faster?

a. it makes lower energy pathways available
b. it increases the concentration of products
c. it increases the concentration of the reactants
d. it binds to enzymes to release substrate

10. what happens to a catalyst in a chemical reaction?

a. it evaporates
b. it remains unchanged
c. it is incorporated into the reactants
d. it is incorporated into the products

11. which of the following substances act as a catalysts in the body?

a. carbohydrates
b. lipids
c. nucleic acid
d. enzymes

12. what is limiting reactant?

a. the reactant that makes the product
b. the reactant that is fully consumed prevents more products from being made
c. the reactant that is used up last and prevents more products from being made
dm the substance that is in excess that doesn’t get used up as a reactant

13. for the reaction: C5H12 + 8 O2 > 5 CO2 + 6 H2O if 2 moles of C5H12 & 8 moles of O2 react, what is the limiting reactant?

a. C5H12
b. O2
c. CO2
d. H2O

14. consider the reaction in #13, how many moles of CO2 is produced in the reaction?

a. 5
b. 6
c. 7
d. 8

15. what is the mass of hydrogen gas (H2) formed when 25 grams of aluminium reacts with excess hydrochloric acid according to this balanced chemical equation:

2 AL + 6 HCl > 2AlCl3 + 3H2

(hint:)
[tex] frac{1 }{1} h : frac{27}{13} al : frac{35}{17cl} [/tex]
a. 0.41 g
b. 1.2g
c. 1.8 g
d. 2.8 g​

1.A

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

## Why is it important to balance a chemical equation? a.)

Ask: Why is it important to balance a chemical equation?

a.) To show that the chemical reaction obeys the Law of Mass Conservation.

b.) To show that the chemical reaction is irreversible.

c.) To show that atoms disappear.

d.) To show that reactants and products appear and disappear. ​

### A.To show thet the chemical reaction obeys the law of mass conversation.

Explanation:

Chemical equations must be balanced to satisfy the law of conservation of matter, that states that matter cannot be produced or destroyed in a closed system. The law of conservation of mass governs the balancing of a chemical equation.

Problem:

• why is it important to balance chemical equation?

• A. To show that the chemical reaction obeys the law of Mass Conservation..

Explanation:

• Chemical equations must be balanced to satisfy the law of conservation of matter, that states that matter cannot be produced or destroyed in a closed system. The law of conservation of mass governs the balancing of a chemical equation.

## D. Pollution 31. Which of the following is the major

Ask: D. Pollution 31. Which of the following is the major cause of wildlife depletion? C. Overfishing A. Deforestation B. Habitat Destruction 32. Adelie penguins, live in large groups in Antarctica. They lay their eggs in dry, rocky areas. These areas can be flooded when snow melts. Based on what you just read, which of these is the greatest threat to Adelie penguins? A. New predators moving into the area. B. Competition from other Adelie penguins. C. Rising temperatures in the penguins’ habitat. D. People polluting and building in the penguins’ habitat. 33. What will most likely happen to a Species of fish if all the female fish are caught? A. The young fish will starve. C. The male fish will move away. B. The species will not survive. D. The male fish will build homes to raise their young. 34. The environmental conditions that keep a population from increasing in size and help balance ecosystems is called A. Abiotic Factor B. Biotic Factor C. Environmental Factor D. Limiting Factor 35. Trees in the forest compete for limited resources like space, sunlight, and soil nutrients. Some small plants like grasses and shrubs can’t grow well therefore, population decreases. Which limiting factor greatly affects the population of grasses and shrubs in forest ecosystem? A. Altitude B. Soil Nutrients C. Space D. Sunlight 36. How is the forest ecosystem affected when trees are cut down? A. Nutrients are lost in the soil. Oxygen will no longer be available for everyone. C. Animals who depend on forests lose their shelter and food. D. There will be available space for humans in building houses and other infrastructures. 37. All organisms get energy from food to perform different life processes. It is done by converting stored energy from food to chemical energy for cell use. Which of the following is associated with the production of chemical energy? A. Chloroplast B. Mitochondrion C. Nucleus D. Vacuole 38. Photosynthesis mostly takes place in the mesophyll layer of the plants. Why is this layer so important in trapping light energy from the sun? Because it A. contains air spaces. C. has the greatest number of chloroplasts. B. is transparent allowing light to penetrate. D. provides an entrance and exit for gases. 39. Why does the Calvin Cycle need the products of the light phase? Because it is needed to A. convert oxygen into sugar. C. convert carbon dioxide into sugar. B. convert sugar into oxygen. D. convert sugar into carbon dioxide. 40. Cellular respiration starts with glycolysis, which occurs in the cytoplasm, producing pyruvic acid. Which of the following processes will allow cellular respiration to continue in the absence of oxygen? A. Krebs Cycle C. Aerobic Respiration B. Electron Transport Chain D. Anaerobic Respiration 41. Complete the equation: Glucose + Oxygen ? Water + A. ADP, Oxygen C. NADH, Oxygen B. ATP, Carbon Dioxide D. Oxygen , ADP 42. When animals respire, they are forced to exhale. What causes this? A. Low blood oxygen C. Dilation of the bronchioles B. High blood carbon dioxide D. Constriction of the bronchioles 43. Plants exchange oxygen and carbon dioxide through the pores in the leaves called stomata and is regulated by the A. Cell Guards B. Chloroplast C. Granum D. Thylakoids 44. What is the process, in animals, that allows the exchange of gases between the alveoli and the capillaries? A. Absorption B. Active transport C. Diffusion D. Osmosis​

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Explanation:

#wagpurobrainlymagaralngmabuti

## Awesome! Now, let us gather what we have learned. 1.

Ask: Awesome! Now, let us gather what we have learned.

1. What is chemical reaction?
2. What are the types chemical reactions? 3. Why is chemical reaction important?
4. What is chemical equation?
5. How do we know if a certain chemical equation is balanced?​

1.A process in which one or more substances, the reactants, are converted to one or more different substances, the products.

2.Combination, decomposition, single-replacement, double-replacement, and combustion.

3.Because of chemical reactions that human beings (and all other animals) reproduce, digest, grow, heal, and think.

4.They are equations that make use of chemical formulae and symbols to represent chemical reactions. The left-hand side of a chemical equation represents the reactants and the right-hand side represents the products. These entities are separated by a symbol that describes the direction of the reaction. Each reacting entity is also assigned its corresponding stoichiometric coefficient.

5.Balancing chemical equations is important because a chemical equation that isn’t balanced doesn’t describe the chemical reaction properly.

Explanation:

Correct me if I’m wrong hope it helps

## Why is it important that a chemical equation be balanced?

Ask: Why is it important that a chemical equation be balanced?

A balanced equation obeys the Law of Conservation of Mass. This is an important guiding principal in science.  Finally, a balanced equation lets up predict the amount of reactants needed and the amount of products formed.

Hope this helps.

Based on G.

## 31. Which of the following is the major cause of

Ask: 31. Which of the following is the major cause of wildlife depletion? D. Pollution A. Deforestation C. Overfishing B. Habitat Destruction 32. Adelie penguins, live in large groups in Antarctica. They lay their eggs in dry, rocky areas. These areas can be flooded when snow melts. Based on what you just read, which of these is the greatest threat to Adelie penguins? A. New predators moving into the area. B. Competition from other Adelie penguins. C. Rising temperatures in the penguins’ habitat. D. People polluting and building in the penguins’ habitat. 33. What will most likely happen to a Species of fish if all the female fish are caught? A. The young fish will starve. C. The male fish will move away. B. The species will not survive. D. The male fish will build homes to raise their young 34. The environmental conditions that keep a population from increasing in size and help balance ecosystems is called A. Abiotic Factor B. Biotic Factor C. Environmental Factor D. Limiting Factor 35. Trees in the forest compete for limited resources like space, sunlight, and soil nutrients. Some small plants like grasses and shrubs can’t grow well therefore, population decreases. Which limiting factor greatly affects the population of grasses and shrubs in forest ecosystem? A. Altitude B. Soil Nutrients C. Space D. Sunlight 36. How is the forest ecosystem affected when trees are cut down? A. Nutrients are lost in the soil. B. Oxygen will no longer be available for everyone. C. Animals who depend on forests lose their shelter and food. D. There will be available space for humans in building houses and other infrastructures. 37. All organisms get energy from food to perform different life processes. It is done by converting stored energy from food to chemical energy for cell use. Which of the following is associated with the production of chemical energy? A. Chloroplast B. Mitochondrion C. Nucleus D. Vacuole 38. Photosynthesis mostly takes place in the mesophyll layer of the plants. Why is this layer so important in trapping light energy from the sun? Because it A. contains air spaces. C. has the greatest number of chloroplasts. is transparent allowing light to penetrate. D. provides an entrance and exit for gases. 39. Why does the Calvin Cycle need the products of the light phase? Because it is needed to A. convert oxygen into sugar. C. convert carbon dioxide into sugar. B. convert sugar into oxygen. D. convert sugar into carbon dioxide. 40. Cellular respiration starts with glycolysis, which occurs in the cytoplasm, producing pyruvic acid. Which of the following processes will allow cellular respiration to continue in the absence of oxygen? A. Krebs Cycle C. Aerobic Respiration B. Electron Transport Chain D. Anaerobic Respiration ? 41. Complete the equation: Glucose + Oxygen Water + ? A. ADP, Oxygen C. NADH, Oxygen B. ATP, Carbon Dioxide D. Oxygen , ADP 42. When animals respire, they are forced to exhale. What causes this? A. Low blood oxygen C. Dilation of the bronchioles B. High blood carbon dioxide D. Constriction of the bronchioles 43. Plants exchange oxygen and carbon dioxide through the pores in the leaves called stomata and is regulated by the A. Cell Guards B. Chloroplast C. Granum D. Thylakoids 44. What is the process, in animals, that allows the exchange of gases between the alveoli and the capillaries? A. Absorption B. Active transport C. Diffusion D. Osmosis

sana ma sagutan para matapos ko na to pag may nag trip dito ahh kayo na bahala​

31.A

32.D

33.B

34.D

35.B

36.C

37.D

38.C

39.C

40.A

tanks sa poonts byehagsu

## LEARNING TASK 1 Complete the diagram below by writing key

Ask: LEARNING TASK 1 Complete the diagram below by writing key points of chemical reaction and Law of conservation of mass. Then in the middle write the connection of these concepts. Answer the guide questions that follows. Guide questions: Balancing Chemical Equation Law of Conservation of Mass 1.Why is balancing of chemical equations important? 2.How is it related to the Law of the Conservation of Mass? 3.Give five (5) examples of chemical reactions in you can observe in your daily life.​

1.Chemical equations must be balanced to satisfy the law of conservation of matter, that states that matter cannot be produced or destroyed in a closed system. The law of conservation of mass governs the balancing of a chemical equation.

2. The Law of Conservation of Mass dates from Antoine Lavoisier’s 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction.

3. Examples of chemical reactions in everyday life include photosynthesis, rust, baking, digestion, combustion, chemical batteries, fermentation, and washing with soap and water.

Explanation: