Assertion- 1 mole - O-3 -ozone-N- molecule of - O-3 -ozone-3N- atoms of - O -oxygen-48g-Reason- A mole is the amount of matter that -160-contains as many as objects as the number of atoms -160-exactly in 12 g C-12 - N- - Avogadro number-Assertion is correct but Reason is incorrect-Assertion is incorrect but Reason is correct-Both Assertion and Reason are correct and Reason is correct explanation of AssertionBoth Assertion and Reason are correct but Reason is not correct explanation of Assertion

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Byju's Answer

Standard IX

Chemistry

Molecules and Atomicity

Assertion: 1 ...

Question

Assertion: 1 mole $O_{3} (o z o n e) = N$ molecule of $O_{3} (o z o n e) = 3 N$ atoms of $O (o x y g e n) = 48 g$

Reason: A mole is the amount of matter that contains as many as objects as the number of atoms exactly in 12 g C-12 ( $N$ = Avogadro number).

Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Both Assertion and Reason are correct and Reason is correct explanation of Assertion

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Both Assertion and Reason are correct but Reason is not correct explanation of Assertion

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Solution

The correct option is C Both Assertion and Reason are correct and Reason is correct explanation of Assertion
$1$ mole of ozone weighs $48$ g (molecular weight). It contains Avogadro number ( $N$ ) of molecules. Each ozone molecule contains $3$ oxygen atoms. Hence, $1$ mole of ozone contains $3 N$ atoms of oxygen.

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Assertion: 1 mole O3(ozone)=N molecule of O3(ozone)=3N atoms of O(oxygen)=48gReason: A mole is the amount of matter that contains as many as objects as the number of atoms exactly in 12 g C-12 (N = Avogadro number).

The correct option is C Both Assertion and Reason are correct and Reason is correct explanation of Assertion1 mole of ozone weighs 48 g (molecular weight). It contains Avogadro number (N) of molecules. Each ozone molecule contains 3 oxygen atoms. Hence, 1 mole of ozone contains 3N atoms of oxygen.

Assertion: 1 mole $O_{3} (o z o n e) = N$ molecule of $O_{3} (o z o n e) = 3 N$ atoms of $O (o x y g e n) = 48 g$

Reason: A mole is the amount of matter that contains as many as objects as the number of atoms exactly in 12 g C-12 ( $N$ = Avogadro number).