what is the meaning of density in chemistry
mass per unit volume
title: Density text: Density The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is "ρ" (the lower case Greek letter rho), although the Latin letter "D" can also be used. Mathematically, density is defined as mass divided by volume: where "ρ" is the density, "m" is the mass, and "V" is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume, although this is scientifically inaccurate – this quantity is more specifically title: Mass concentration (chemistry) text: Mass concentration (chemistry) In chemistry, the mass concentration (or ) is defined as the mass of a constituent divided by the volume of the mixture : For a pure chemical the mass concentration equals its density (mass divided by volume); thus the mass concentration of a component in a mixture can be called the density of a component in a mixture. This explains the usage of (the lower case Greek letter rho), the symbol most often used for density. The volume in the definition refers to the volume of the solution, "not" the volume of the solvent. One liter of title: Density text: g/cc ≈ 1.00224129 ounces per Imperial fluid ounce = 10.0224129 pounds per Imperial gallon. The density of precious metals could conceivably be based on Troy ounces and pounds, a possible cause of confusion. Density The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is "ρ" (the lower case Greek letter rho), although the Latin letter "D" can also be used. Mathematically, density is defined as mass divided by volume: where "ρ" is the density, "m" is the mass, and "V" is the volume. In title: Mass concentration (chemistry) text: is given by: The values of (mass and molar) concentration different in space triggers the phenomenon of diffusion. Mass concentration (chemistry) In chemistry, the mass concentration (or ) is defined as the mass of a constituent divided by the volume of the mixture : For a pure chemical the mass concentration equals its density (mass divided by volume); thus the mass concentration of a component in a mixture can be called the density of a component in a mixture. This explains the usage of (the lower case Greek letter rho), the symbol most often used for density. The volume in title: Number density text: Number density In physics, astronomy, chemistry, biology and geography, number density (symbol: "n" or "ρ") is an intensive quantity used to describe the degree of concentration of countable objects (particles, molecules, phonons, cells, galaxies, etc.) in physical space: three-dimensional volumetric number density, two-dimensional areal number density, or one-dimensional line number density. Population density is an example of areal number density. The term number concentration (symbol: "C", to avoid confusion with amount of substance "n") is sometimes used in chemistry for the same quantity, particularly when comparing with other concentrations. Volume number density is the number of specified objects per unit