By a detailed laboratory analysis.
chemical change
Physical change
Yes. Rusting is a chemical reaction between iron and oxygen.
The candle burning is a chemical process.
Put it on a balance and determine its mass.
physical: it's a change of state, it does not change the chemical makeup: molecular, atomic
you must know the molar mass! you need to get the empirical formula first too.
The Caruso 97956 14-Piece Protraveler Molecular Steam Hairsetter works on a Molecular structure to set your hair.
Absolutely not. Monosaccharides exist on the molecular level - molecules like glucose, fructose, and galactose. Ham is a piece of meat. The distinction is pretty clear.
chemical
Yes, as it's still glass. There is no chemical/molecular change.
The paper can be uncrumpled. There was no chemical change that occurred, so its basic molecular structure is still the same.
ANSWER:Its a physical change. If you burned it and it became ash, its a chemical change. Physical change means it made no change on a molecular level. Its still paper, just in two separate pieces.It is a physical change, as the chemical property of the paper remains unchanged.
chemical change
Because you can't put it back together. Imagine burning a piece of paper, there is no way that you can get that piece of paper back. Burning that piece of paper was a chemical change because you changed the chemical properties of the paper. Crumpling or cutting the paper doesn't change the molecular structure of the paper, so it is a physical change.
atom - smallest piece of an element that keeps its chemical properties; compound - substance that can be broken into elements by chemical reactions
Physical change