An important idea in ancient Greek philosophy is that "Nothing comes from nothing", so that what exists now has always existed, since no new matter can come into existence where there was none before. An explicit statement of this, along with the further principle that nothing can pass away into nothing, is found in Empedocles (ca. 490-430 BCE): "For it is impossible for anything to come to be from what is not, and it cannot be brought about or heard of that what is should be utterly destroyed". A further principle of conservation was stated by Epicurus (341-270 BCE) who, describing the nature of the universe, wrote that "the totality of things was always such as it is now, and always will be". Jain philosophy, which is a non-creationist philosophy and based on teachings of Mahavira (6th century BCE), states that universe and its constituents like matter cannot be destroyed or created. TheJain text Tattvarthasutra (2nd Century) states that a substance is permanent, but its modes are characterised by creation and destruction. A principle of the conservation of matter was also stated by Nasīr al-Dīn al-Tūsī (1201-1274) during the 13th century. He wrote that "A body of matter cannot disappear completely. It only changes its form, condition, composition, color and other properties and turns into a different complex or elementary matter".
The principle of conservation of mass was first outlined clearly by Antoine Lavoisier (1743-1794) in 1789, who is often for this reason (see below) referred to as an initiator of modernchemistry. It has been claimed that Mikhail Lomonosov (1711-1765) had expressed similar ideas during 1748-and proved them by experiments-but this has been challenged. Others who anticipated the work of Lavoisier include Joseph Black (1728-1799), Henry Cavendish (1731-1810), and Jean Rey (1583-1645).
(Taken directly from wikipedia: http://en.wikipedia.org/wiki/Conservation_of_mass#Historical_development_and_importance)
Antoine Lavoisier
It was a France scientist named Antoine Laurent Lavoisier.
The law of conservation of mass/matter states that mass/matter cannot be created or destroyed in chemical or physical changes.
Antoine Lavoisier
Law of Conservation of mass(atomic mass). As mass can be considered relative to energy, therefore Law of Conservation is also correct but Law of conservation of mass is is much more accurate because here mass is a much more accurate term that is required here. Here, since, we are balancing molecules, then we require atomic or molecular mass.
Antoine Lavoisier
It was a France scientist named Antoine Laurent Lavoisier.
The law of Conservation of Mass was invented by a French chemist Antoine-Laurent Lavoisier.
The law of conservation of mass/matter states that mass/matter cannot be created or destroyed in chemical or physical changes.
The law of conservation of mass, which states that in a closed system, mass is neither created nor destroyed, it can only change form. This means that in a chemical reaction that takes place in a closed system, the mass of the reactants equals the mass of the products.
Antoine Lavoisier
Law of Conservation of mass(atomic mass). As mass can be considered relative to energy, therefore Law of Conservation is also correct but Law of conservation of mass is is much more accurate because here mass is a much more accurate term that is required here. Here, since, we are balancing molecules, then we require atomic or molecular mass.
it is the same as the law of conservation of mass
The Law of conservation of Energy applies to mass as mass is a form of energy, E=mc2.
Law of Conservation of Mass (aka Law of Conservation of Matter)
the law of conservation of mass
it conserves mass