Some Basic Concepts Of Chemistry Question 274

Question: Which of the following contains maximum number of atoms [JIPMER 2000]

Options:

A) $ 6.023\times 10^{21} $ molecules of $ CO _2 $

B) 22.4 L of $ CO _2 $ at STP

C) 0.44 g of $ CO _2 $

D) None of these

Show Answer

Answer:

Correct Answer: B

Solution:

a. $ 6.023\times 10^{23} $ molecules of $ CO _2 $

No. of atoms $ =3\times 6.023\times 10^{21} $ = $ 18.069\times 10^{21} $ atoms b. 22.4L of $ CO _2 $

No. of atoms = $ 6.023\times 10^{23}\times 3 $ $ =18.069\times 10^{23} $ atoms c. 0.44gm of $ CO _2 $

No. of moles $ =\frac{0.44}{44}=\frac{1}{100}\times 6.023\times 10^{23} $ moles $ =6.023\times 10^{21} $ moles $ =3\times 6.023\times 10^{21} $ atoms $ 18.069\times 10^{21} $ atoms



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