Who said "Matter can not be created or destroyed? "?

Question

Who said "Matter can not be created or destroyed? "?

Answer 1

Not me. I wasn't even in the same room.

Answer 2

I do beleive it's a law of thermodynamics. although energy, as opposed to matter, might have been mentioned.

Answer 3

It's not masser it's enargu

Answer 4

Lavoisier in France. He did an experiment where he ran steam through a rifle barrel. He caught all of the water and of the hydrogen that was produced when the rifle rusted away. He showed that even tough a chemical reaction had taken place, all of the resultants still added up the same as what he started with, this being the hydrogen, water, rust (iron-oxide), and iron.

He was trying to put all of this back together as what he started with, which wouldn't have worked anyway, but the French Revolution happened first.

Answer 5

The universe.

Answer 6

The law of conservation of mass/matter, also known as law of mass/matter conservation (or the Lomonosov-Lavoisier law), states that the mass of a closed system will remain constant, regardless of the processes acting inside the system.[1] An equivalent statement is that matter cannot be created/destroyed, although it may be rearranged. This implies that for any chemical process in a closed system, the mass of the reactants must equal the mass of the products.

he law of conservation of mass was first clearly formulated by Lavoisier (1743-1794)

However, Mikhail Lomonosov (1711-1765) had previously expressed similar ideas in 1748 and proved them in experiments.  

Answer 7

Lavoisier, i think, in his law of conservation of mass