Class 9 Exam > Class 9 Questions > Direction: Two class students of class 9th, ...
Start Learning for Free
Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.
Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.
- a)Atomic number
- b)Electron
- c)Proton
- d)Mass
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Direction: Two class students of class 9th, Aashi and Sheena, were as...
- The law states that mass can neither be created nor be destroyed.
- 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.
Most Upvoted Answer
Direction: Two class students of class 9th, Aashi and Sheena, were as...
The Law of Conservation of Mass states that mass can neither be created nor destroyed in a chemical reaction. This means that the total mass of the reactants must be equal to the total mass of the products. In other words, the mass of the substances before the reaction is the same as the mass of the substances after the reaction.
In the given question, Aashi and Sheena were asked to react sodium carbonate (Na2CO3) with ethanoic acid (CH3COOH) to produce carbon dioxide (CO2), water (H2O), and sodium ethanoate (CH3COONa). Aashi followed the instructions and measured the amounts of the reactants, while Sheena did not measure the amounts.
Let's analyze the reaction:
1. Sodium carbonate (Na2CO3) reacts with ethanoic acid (CH3COOH) to produce sodium ethanoate (CH3COONa), carbon dioxide (CO2), and water (H2O).
2. The balanced chemical equation for this reaction is:
Na2CO3 + 2CH3COOH -> 2CH3COONa + CO2 + H2O
According to the given information, the total mass of the products is 2.2 g of carbon dioxide, 0.9 g of water, and 8.2 g of sodium ethanoate. This means that the total mass of the reactants must also be equal to these values.
Now, let's consider what happened when Aashi followed the instructions:
- Aashi measured 5.3 g of sodium carbonate and 6 g of ethanoic acid.
- According to the balanced equation, 5.3 g of sodium carbonate reacts with 2 moles of ethanoic acid, which is equal to 2 × (60 g/mol) = 120 g.
- Aashi has taken 6 g of ethanoic acid, which is less than the required amount. This means that there will be some excess sodium carbonate left unreacted.
Now, let's consider what happened when Sheena did not measure the amounts:
- Sheena took the chemicals without measuring their amounts.
- It is not possible to determine the exact amounts of sodium carbonate and ethanoic acid taken by Sheena.
- However, we can conclude that the total mass of the reactants taken by Sheena is not equal to the total mass of the products.
In both cases, the Law of Conservation of Mass is upheld. The total mass of the reactants is equal to the total mass of the products, as it should be according to the law. This demonstrates the importance of measuring the amounts of reactants accurately in order to ensure the reaction proceeds as expected.
In the given question, Aashi and Sheena were asked to react sodium carbonate (Na2CO3) with ethanoic acid (CH3COOH) to produce carbon dioxide (CO2), water (H2O), and sodium ethanoate (CH3COONa). Aashi followed the instructions and measured the amounts of the reactants, while Sheena did not measure the amounts.
Let's analyze the reaction:
1. Sodium carbonate (Na2CO3) reacts with ethanoic acid (CH3COOH) to produce sodium ethanoate (CH3COONa), carbon dioxide (CO2), and water (H2O).
2. The balanced chemical equation for this reaction is:
Na2CO3 + 2CH3COOH -> 2CH3COONa + CO2 + H2O
According to the given information, the total mass of the products is 2.2 g of carbon dioxide, 0.9 g of water, and 8.2 g of sodium ethanoate. This means that the total mass of the reactants must also be equal to these values.
Now, let's consider what happened when Aashi followed the instructions:
- Aashi measured 5.3 g of sodium carbonate and 6 g of ethanoic acid.
- According to the balanced equation, 5.3 g of sodium carbonate reacts with 2 moles of ethanoic acid, which is equal to 2 × (60 g/mol) = 120 g.
- Aashi has taken 6 g of ethanoic acid, which is less than the required amount. This means that there will be some excess sodium carbonate left unreacted.
Now, let's consider what happened when Sheena did not measure the amounts:
- Sheena took the chemicals without measuring their amounts.
- It is not possible to determine the exact amounts of sodium carbonate and ethanoic acid taken by Sheena.
- However, we can conclude that the total mass of the reactants taken by Sheena is not equal to the total mass of the products.
In both cases, the Law of Conservation of Mass is upheld. The total mass of the reactants is equal to the total mass of the products, as it should be according to the law. This demonstrates the importance of measuring the amounts of reactants accurately in order to ensure the reaction proceeds as expected.
Attention Class 9 Students!
To make sure you are not studying endlessly, EduRev has designed Class 9 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 9.
|
Explore Courses for Class 9 exam
|
|
Similar Class 9 Doubts
Top Courses for Class 9View all
Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer?
Question Description
Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer?.
Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free.
Here you can find the meaning of Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Direction: Two class students of class 9th, Aashi and Sheena, were asked to take 5.3 g of sodium carbonate and 6 g of ethanoic acid to make 2.2 g of carbon dioxide, 0.9 g of water and 8.2 g of sodium ethanoate. Aashi followed the instructions but Sheena took the chemicals without measuring their amounts.Q. The Law states that _______ can neither be created nor be destroyed in a chemical reaction.a)Atomic numberb)Electronc)Protond)MassCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 9 tests.
|
|
Explore Courses for Class 9 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup