One mole of CO₂ contains?

• (A). 6.02 × 10²³ atoms of oxygen
• (B). 6.02 × 10²³ atoms of carbon
• (C). 18.10 × 10²³ molecules of CO₂
• (D). 3 g atoms of CO₂

One mole of carbon dioxide (CO₂) contains a specific number of molecules, atoms, and mass. To break it down:

Molecular Composition of CO₂

Each molecule of CO₂ consists of one carbon atom and two oxygen atoms. Therefore, in one mole of CO₂:

• There are 6.02 × 10²³ molecules of CO₂.
• This means there are 6.02 × 10²³ carbon atoms and 2 × 6.02 × 10²³ = 1.204 × 10²⁴ oxygen atoms.

Evaluating the Options

Now, let's look at the options provided:

• (A) 6.02 × 10²³ atoms of oxygen - This is incorrect as there are actually 1.204 × 10²⁴ oxygen atoms.
• (B) 6.02 × 10²³ atoms of carbon - This is correct; there is one mole of carbon atoms in one mole of CO₂.
• (C) 18.10 × 10²³ molecules of CO₂ - This is incorrect; one mole equals 6.02 × 10²³ molecules.
• (D) 3 g atoms of CO₂ - This is misleading; the molar mass of CO₂ is about 44 grams, not 3 grams.

In summary, the correct answer is (B) 6.02 × 10²³ atoms of carbon.