Question

which of the following contains the greatest no of atoms? 1) 1.0 g of C4H10 2) 1.0 gm of Ag 3) 1.0gm of N2 4) 1.0 gm of H2O​

Answer 1

1) 1.0 g of C4H10.

For butane C4 H 10

Number of atoms in compound=14

Molar mass =58 g/ mol

no. of moles = 1/58 = 0.0172

no. of molecules = 6.023 ×10^23×moles

= 6.023×10^23 × 0.0172

= 1.038 ×10^22

Total no. of atoms = 14× 1.038 ×10^22

= 1.453 ×10^23 in Butane

So butane has highest no. of atoms among the given options.