Which of the folowing demonstrates a chemical property that distinguishes one substance from another?
598151
A) carbon burning in air\nAll the other choices demonstrate physical changes.
713316
HNO3\n\nIf you couldn't answer this question, you must be a real noob in chemistry!!  Well, for other times, here's the way to differentiate betwee acids and bases.\n\nAcids:   acids can be easily identified by the hydrogens they contain.  Most acids have their hydrogen in the beginning of their formula.  HNO3 can be easily identified as an acid: it is commonly called nitric acid.\n\nBases:  most bases can be identified by the (OH) group at the end of their formula... therefore, we can immediately label b) and d) as bases.   \n\nNow here, NH3 is kind of tough to define with the definitions given above.   I believe that the proper explanation is out of your scope for know (from what I can deduce).   So, you'll learn that later on.  But for your info, NH3 is ammonia, the stuff they use in cleaning fluids, and it is basic.\n\nHope this helps.
363326
not chemical reations\n\nonly reflection...
989710
1. impurities in the compound\n2. temperature of the surface thats heated on\n3. old lab furniture.\ncant say more!
457821
When you use an IR spectroscopy machine, you get a a graph show the amount of energy transmitted by the substance as different wavelengths. If the substance you're testing is pure, the graph will have specific peaks at certain wavelengths. So the graph will have a certain shape for a certain substance. If there are impurities in an ester, you will see peaks in the IR graph that are not in the ester's actual spectroscopy graph, indicating something else in it. If the ester is pure, its IR graph would match that in a reference book.
639263
A) indicator\nAn indicator is a substance that tells you how acidic or basic a solution is by a visual color change, and because a high concentration of H+ ions is the same thing as high acidity, A is the answer.
899857
A solid that is formed by a chemical reaction.
66886
GO to wikipedia.com and type in chemical reaction.  That is kind of a tough definition, so I will help to break it down a little for you.  Basically, you got something, and it changes into a whole new a different thing.  That is a chemical reaction.  It could be 2 things coming together to make 1 thing, or vice versa.  Or two things could lead to 2 new things.  The most important part of a chemical reaction is that substances change to NEW substances that have serperate properties and characteristics from the original.\nOn wikipedia there is a link to an IUPAC definition.  IUPAC is pretty much in charge of defining stuff in chemistry, so their definition is the one you're looking for, however, it might be a little complicated.  If this didn't help, maybe you should repost your question.
207694
Chemical properties are properties such as boiling point, freezing point, melting point, electronegativity, flammability, and so forth.  Physical properties are the ones the human senses can pick up with out having to change the chemical, such as taste, smell, sound.
294819
acetol?\n\nany of various compounds characterized by the grouping C(OR)2 and obtained especially by heating aldehydes or ketones with alcohols
1136618
flammability is a physical property of a substance.
1013119
Chemistry is the science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems.\n\nBut Science is the observation, identification, description, experimental investigation, and theoretical explanation of phenomena.\n\nTechnolgy is  the application of science, especially to industrial or commercial objectives.
40476
it a chemical combination of two or more atoms of 1 or more elements.\nIt can be a molecule of an element in particuular or it can be a compound molecule.\nMolecule is the form in which the chemical substances usually tend to exist.\nIts characteristics are : \n-it is chemically stable\n-it has definite propperties\nand so on...........
159409
the rule of thumb is "like dissolves like" \nWater is polar so if it dissolves a substance, that substance is also polar.
312402
Chemical is a any substance having a defined molecular composition.  It can also be thought of as everything you see and touch except for light and electricity.
544226
a physical property is something that identifies an object such as color, shape, texture, phase, height, weight, etc.
1107077
Chemical properties of matter are those that relate to how the substance changes in composition or how it interacts with other substances.\nSome examples of chemical properties are: \npaper burns \niron rusts \ngold does not rust \nwood rots \nnitrogen does not burn \nsilver does not react with water \nsodium reacts with water \nIn each of these, the substance's chemical property is its tendency to:\nreact \ntarnish \ncorrode \nexplode