PHYSICAL QUANTITY
Molar mass: formulas and units of measurement
Molar mass: symbol M, unit kg/mol. Formulas and explanations for MCT and thermodynamics.
MM\frac{\text{кг}}{\text{моль}}kilogram per mole
KEY CONNECTIONS
Formulas
M=M_r\cdot 10^{-3}\ \frac{\text{кг}}{\text{моль}}M = Mᵣ · 10⁻³ кг/моль
M=m_0N_AM = m₀Nₐ
pV=\frac{m}{M}RTpV = (m/M)RT
U=\frac{3}{2}\frac{m}{M}RTU = (3/2)(m/M)RT
v_{\text{кв}}=\sqrt{\frac{3RT}{M}}vкв = √(3RT / M)
NOTATION
Quantities in formulas
- M
- Molar mass is the mass of one mole of a substance.
- M_r
- Relative molecular mass is the ratio of the mass of a molecule to the atomic mass unit.
- m_0
- The mass of one particle is the mass of an individual molecule or atom of a substance.
- N_A
- Avogadro's constant is the number of particles in one mole of a substance.
- p
- Pressure is the force per unit surface area.
- V
- Volume is the size of the area of space occupied by a body.
- m
- Mass is a scalar physical quantity that is a measure of the inertia of a body.
- R
- The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
- T
- Temperature is a measure of the thermal state of the body.
- U
- Internal energy is the energy of movement and interaction of particles of matter.
- v_{\text{кв}}
- Root mean square velocity is a characteristic of the thermal motion of gas particles.
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