Question

Among the following, choose the ones with an equal number of atoms.

A. 212 g of Na₂CO₃(s) [molar mass = 106 g]

B. 248 g of Na₂O(s) [molar mass = 62 g]

C. 240 g of NaOH(s) [molar mass = 40 g]

D. 12 g of H₂(g) [molar mass = 2 g]

E. 220 g of CO₂(g) [molar mass = 44 g]

Choose the correct answer from the options given below:

Options

• A, B, and C only

• A, B, and D only

• B, C, and D only

• B, D, and E only

Answer 1

A, B, and D only

Explanation:

Number of atoms = Atomicity × Mole × N_A

A. Number of atoms = `6 xx (212/106) N_A`

= 12 N_A

B. Number of atoms = `3 xx (248/62)N_A`

= 12 N_A

C. Number of atoms = `3 xx (240/40)N_A`

= 18 N_A

D. Number of atoms = `2 xx (12/2)N_A`

= 12 N_A

E. Number of atoms = `3 xx (220/44)N_A`

= 15 N_A