Question

Which gas among the following contains a maximum number of molecules at STP?

(Molar masses in g mol^-1 : CO₂ = 44, Ar = 39.9, CH₄ = 16, O₂ = 32)

विकल्प

• 13.3 g of Ar

• 11 g of CO₂

• 24.0 g of O₂

• 16.0 g of CH₄

Answer 1

16.0 g of CH₄ 

Explanation:

i. `"n"_"Ar" = 13.3/39.9` = 0.33 mol

ii. `"n"_("O"_2) = 24/32` = 0.75 mol

iii. `"n"_("CO"_2) = 11/44 = 0.25` mol

iv. `"n"_("CH"_4) = 16/16` = 1 mol

∴ Maximum no. of moles = Maximum no. of molecules.