Question

carbon dioxide contains carbon to oxygen in a 3:8(12:32) ratio .if 5 gm of carbon reacts with 32 gm of oxygen then how many gram of carbon dioxide is formed ?
class 9
chapter 3- atoms and molecules
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Answer 1

Answer:

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

Explanation:

The atomic weight of Carbon atom=12

The atomic weight of Oxygen atom=16

Hence the atomic weight of carbon and oxygen atoms are constant

In CO  

2

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, the mass of carbon is 12 whereas that of oxygen is 32. Hence the ratio of their masses is 12:32=3:8

However, this fact is not justified by the constant atomic mass of carbon and oxygen. Hence both the statements are correct but the reason is not a correct explanation for the assertion

                                                             answer by harshit