Which one of the following has minimum number of atoms?
(a) 1 g CO (b) Ig N (c) Ig O2 (d) Ig H2
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Correct option is
(D)
1g H
2
For a molecule,
molecular weight in grams = Avogadro's number(N
A
)=6.023×10
23
(A) 1g CO
2
44 gram of CO
2
=N
A
molecules
∴ 1 gram of CO
2
contains
44
1
×N
A
molecules
(B) 1g N
2
28 gram of N
2
=N
A
molecules
∴1 gram of N
2
contains
28
1
×N
A
molecules
(C) 1g H
2
2 gram of H
2
contains N
A
molecules
∴ 1 gram of H
2
contains
2
1
×N
A
molecules
(D) 1g CH
4
16 gram of CH
4
=N
A
molecules
∴ 1 gram of CH
4
=N
A
/16
Maximum number of molecules are found in 1 gram hydrogen.
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