Question

20.
In which of the following pairs both members have same no. of atoms
(A) 1 gm Oz, 1 gm O3
(B) 1 gm N2, 2 gm N
(C) Both
(D) None​

Answer 1

Answer:

c is the answer

Explanation:

(B) 1 gm o2,1 gm o3

moles o2=1/32gm

number of oxygen atom

o2= 1/32*2*NA(avagadros number )

1/16*NA(Avagadro's number)

moles o3=1/48g

number of atom in o3

1/48*3*NA (Avagadros number)

NA/16

(A) 1gm N2; 1 gm N

similarly

number of nitrogen atoms

1gm------>N2

1moles ----> 1/14*2g

2moles------>(2/(14*2)) NA=NA/14

2gm------------>N

1moles------------>1/14*2/2*NA

so , boths the options are correct

hope it helps!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 2

Answer:

The correct answer is c) Both

Explanation:

Both the pairs, 1gm of ozone, 1gm of O3 and 1g of N2 and 2g of N have same number of atoms.

This is because, in case with ozone:

Both 1g of ozone and $O_{3}$ has same number of atoms in them. This is because in both ozone and $O_{3}$ the number of atoms present is the same

1g of ozone = 16 x 3 x 1g = 48 amu

1g of $O_{3}$       =  16 x 3 x 1g = 48 amu

Similarly in case of Nitrogen,

1g of $N_{2}$ = 14 X 2 x1g = 28 amu

2g of N = 14 x 2g      =  28 amu

Thus it is clear that, both in both ozone and nitrogen molecule, the number of atoms remains the same.

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