Two flasks A and B of equal volume contain 2 g of `H_2` and 2 g of `N_2` respectively at the same temperature and pressure. The number of molecules in flask A is :

Options

A. same as the number of molecules in flask B
B. half the number of molecules in flask B
C. 7 times the number of molecules in flask B
D. 14 times the number of molecules in flask B

Answer

D

Explanation

No. of molecules in flask A
` = ( (6 xx 10^23) /(2) ) xx 2 = 6 xx 10^23 `
No. of molecules in flask B
` = (6 xx 10^23)/(28) xx 2 = (6 xx 10^23)/(14)`
` therefore ` Flask A contains 14 times the number of molecules in flask B