Question

Give the no. of molecules in a)19co2 b)1gN2​

Answer 1

Explanation:

For a molecule,

molecular weight in grams = Avogadro's number(NA)=6.023×1023

(A) 1g CO2

44 gram of  CO2 =NA molecules

∴  1  gram  of  CO2  contains 441×NA molecules

(B) 1g N2

28 gram of   N2=NA molecules

∴1 gram of  N2 contains 281×NA molecules

(C) 1g H2

2 gram of H2 contains NAmolecules

∴ 1  gram of H2 contains  21×NA molecules

(D) 1g  CH4

16 gram of CH4 =NA molecules

∴ 1 gram of   CH4 =NA/16

Maximum number of molecules are found in 1 gram hydrogen.