Which one of the following pairs of gases contains the same number of

1.	Which one of the following pairs of gases contains the same number of molecules? (A) 16 g of O2 and 14 g of N2 (B) 8 g of O2 and 22 g of CO2 (C) 28 g of N2 and 22 g of CO2 (D) 32 g of O2 and 32 g of N2
Answer» Correct option: (A) 16 g of O₂ and 14 g of N₂ 16 g O₂ has number of moles = \(\cfrac{16}{32} = \cfrac{1}{1}\) 14 g N₂has number of moles = \(\cfrac{14}{28} = \cfrac{1}{2}\) Number of moles are same, so number of molecules are same.

Which one of the following pairs of gases contains the same number of molecules? (A) 16 g of O2 and 14 g of N2 (B) 8 g of O2 and 22 g of CO2 (C) 28 g of N2 and 22 g of CO2 (D) 32 g of O2 and 32 g of N2

Answer»

Correct option: (A) 16 g of O₂ and 14 g of N₂

16 g O₂ has number of moles = \(\cfrac{16}{32} = \cfrac{1}{1}\)

14 g N₂has number of moles = \(\cfrac{14}{28} = \cfrac{1}{2}\)

Number of moles are same, so number of molecules are same.