Question

 Which of the following contains maximum number of molecules?

(a) 19 CO2

(b) 1 g N2

(c) 1 g H2

(d) 1 g CH4​

Answer 1

Answer:

1g H2 contains a maximum number of molecules.

The molecules present in the 1g CO2:

Molar mass of CO2 = 44g

The number of molecules

=

= 0.02NA

The molecules present in the 1g N2 :

Molar mass of N2 = 28g

The number of molecules

=

= 0.03NA

The molecules present in the 1g H2 :

Molar mass of N2 = 2g

=

= 0.5NA

The molecules present in the 1g CH4 :

Molar mass of CH4 = 16g

=

= 0.06NA

Thus, we can see that 1g H2 contains the highest number of molecules.

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Answer 2

Answer:

1g H2 is the answer