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🔢 Number Density Calculator
Calculate number density, particle concentration, and related properties of materials
📐 Number Density Formulas
n = N/V
n = ρ × N_A / M
n = P/(k_B × T) (Ideal Gas)
n = Z × ρ × N_A / M
n = number density, N = number of particles, V = volume, ρ = density, N_A = Avogadro's number, M = molar mass, P = pressure, k_B = Boltzmann constant, T = temperature, Z = atomic number
💡 Tips
- Number density is the number of particles per unit volume
- Higher number density means particles are closer together
- For gases, number density increases with pressure
- For solids, number density depends on crystal structure
- Avogadro's number is 6.022×10²³ particles/mol
- Mean free path decreases with increasing number density