Class 11 Chemistry simulations · Some Basic Concepts of Chemistry

Mole concept: mass, moles and particles

Weigh out a substance and convert its mass into moles and into the number of molecules.

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What to notice

Equal numbers of moles contain equal numbers of particles, whatever their masses.

Key relation

n = m / M ; N = n × Nₐ (Nₐ = 6.022 × 10²³ mol⁻¹)

Try this

Take 18 g of water and then 44 g of CO₂. How many molecules does each contain?

What you can change

• Substance: choose Water (H₂O), Carbon dioxide (CO₂), Ammonia (NH₃), Sodium chloride (NaCl), Glucose (C₆H₁₂O₆)
• Mass taken: 1 to 200 g

More in Some Basic Concepts of Chemistry

• Molarity and dilution
• Empirical formula from percentage composition
• Limiting reagent: making water

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