Question

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

1. 212 g of Na₂CO₃ (s) [molar mass = 106 g]
2. 248 g of NaNO₃ (s) [molar mass = 62 g]
3. 240 g of NaOH (s) [molar mass = 40 g]
4. 12 g of H₂ (g) [molar mass = 2 g]
5. 220 g of CO₂ (g) [molar mass = 44 g]

Choose the correct answer from the options given below:

• A. A, B, and D only
• B. B, C, and D only
• C. B, D, and E only
• D. A, B, and C only

Hint:

When comparing number of atoms in different compounds, first calculate the number of moles and then multiply by the number of atoms per mole.