In the nature and the equipment the weight and volume are among themselves interconnected. Each body has these two parameters. Weight - is the size of weight of a body, and volume - its size. There are several ways of finding of volume, knowing body weight.
Instruction
1. Weight with a volume are among themselves closely interconnected. When you consider various tasks, see that volume can be found in several ways, knowing weight. And tasks, as a rule, concern two sciences - physics and chemistry. The easiest way of finding of volume is its expression through density. It is known that density is equal to weight divided into volume: ρ = m/V.Sootvetstvenno, volume is equal: V = m/ρ.Масса of two substances can be identical. However if these substances are various, for example copper and iron, then their volume will be a miscellaneous as their density are not identical.
2. In chemistry there is a model of ideal gas of 1 mol with the constant molar volume of V = 22.4 mol/l. This gas has such volume with a constant pressure and temperature. Molar volume is considered generally from a chemistry position. from the physical point of view the volume can change. Nevertheless there is an interrelation of molar volume and volume of some portion of gas: Vm = Vv/nv, where the V m - molar volume; Vv is the volume of a portion of gas; n in - amount of substance. The amount of substance is equal: nv = mv/Mv where mv is the mass of substance, MV - the molar mass of substance. Respectively, the volume of a portion of gas is equal: Vv = Vm*mv/Mv.
3. If in a task the concentration of substance and its weight is given, then volume can be expressed easily from a formula: c = n/V = m/M/V.MV = m/c, where M - the molar mass of substance. From here volume is calculated on a formula: V = m/Mc = n/V where n is amount of substance.
4. If in a task ideal gas with some pressure of p, temperature of T and amount of substance n is given, then it is possible to apply Mendeleyev-Klapeyrona's equation which will allow to express volume: pV = mRT/M where R is a universal gas constant. Respectively, proceeding from the equation, we look for volume: V = mRT/Mp. This equation is suitable only look for those gases which parameters are close to ideal.