Loschmidt's number

Loschmidt's number is an estimate of the number of particles, such as molecules or atoms, in a given volume of gas at standard conditions. Essentially, it tells us how many tiny particles are packed into one cubic centimeter of gas under normal temperature and pressure. This number helps scientists understand the microscopic scale of gases and is fundamental in fields like chemistry and physics. It is approximately 2.5 x 10^19 particles per cubic centimeter, highlighting the astonishingly small size and vast quantity of particles that make up everyday gases.