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What is the volume of a matter and how are volume and mass different?
Volume is a measure of the amount of space occupied by a liquid, solid, or gas.
The basic SI unit to express volume is cubic meter $m^3$, smaller volumes may be measured in $cm^3$, and liquids may be measured in liters $(L)$ or milliliters $(mL)$.
If the matter is liquid, then the volume will be measured with a measuring container, such as a measuring cup or cylinder.
If the matter is gas, then the volume of a gas depends on the volume of its container: gases expand to fill whatever space is available to them.
If the matter is solid, then the volume of a regularly shaped solid can be calculated from its dimensions.
For example: the volume of a rectangular solid is the product of its length, width, and height.
While, if the shape of the solid is irregular, then the volume can be measured by the displacement method.
Mass is the measure of the amount of matter in a substance or an object. The basic SI unit to express mass is the kilogram $(kg)$, smaller masses may be measured in grams $(g)$.
Thus, volume is the amount of space occupied by a substance, while mass is the amount of matter it contains.
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