How many molecules are present in 2 moles of CO₂?

Question

Question

This question was previously asked in

RRB NTPC Graduate Level CBT-I Official Paper (Held On: 09 Jun, 2025 Shift 1)

Answer 1

The correct answer is 12.044 × 10²³.

Key Points

The number of molecules in a substance is calculated using Avogadro's number (6.022 × 10²³ molecules/mol).
In this question, we are given 2 moles of CO₂.
To find the number of molecules, multiply the number of moles by Avogadro's number: 2 × 6.022 × 10²³ = 12.044 × 10²³ molecules.
Hence, 12.044 × 10²³ molecules are present in 2 moles of CO₂.
This calculation is based on the fundamental concept of mole and Avogadro's constant.

Additional Information

Avogadro's Number:
- Avogadro's number (6.022 × 10²³) represents the number of particles (atoms, molecules, or ions) in one mole of a substance.
- It is a fundamental constant in chemistry.
Mole Concept:
- A mole is a unit in chemistry used to express amounts of a chemical substance.
- One mole of any substance contains exactly 6.022 × 10²³ particles.
Carbon Dioxide (CO₂):
- It is a molecule composed of one carbon atom and two oxygen atoms.
- It is a major greenhouse gas and is essential for the process of photosynthesis in plants.
Applications of Avogadro's Number:
- Used to calculate the number of particles in a given amount of substance.
- Helps in determining molar mass and molecular formulas in stoichiometry.