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Was it possible to determine if a substance was pure by just its appearance?
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How can you tell if something is a pure substance?
There are many different techniques of chemical analysis, and the first step is to just look at the substance and see if you can observe anything non-homogeneous in its appearance. If the substance is a solid you could add water and see if all of it dissolves or just part of it. Chromatography is a useful technique; if you put a liquid on a paper or paper-like material, different substances diffuse at different speeds. Spectrography can be used to identify the constituent elements, which is at least a major clue as to what you are dealing with in terms of possible compounds. Distillation could be used to see if there is a component that has a lower boiling point than other components. A centrifuge can be used to separate out a denser component. And so forth.
What properties of substances can you observe and how do these properties determine the usefulness or hazards of a substance?
You can observe physical, chemical, and characteristic properties of a substance and can be used to determine the usefulness of a substance by, giving us information about the substance usually using our 5 senses which are physical properties. Or being able to describe the substances ability to undergo changes to its composition to produce one or more new substances, chemical property. Or even just being able to identify whether or not the substance is pure or not can help us determine if the substance is hazardous or not. two other properties I did not mention were the qualitative and the quantitative properties.
Substance X is a molecular compound and is not an acid Based just on this information what can you determine about substance X?
X is not an electrolyte, since you know that it isn't an acid. molecular compounds can be both soluble and insoluble.
What property of a substance can be determined using a pH indicator?
A pH indicator will test a substance to determine the alkali or acidity, with 7 being neutral on the pH scale.
Is cutting a diamond a physical change?
Crushing a diamond is a physical change because the substance is the same just the appearance isn't,
How can you tell if something is a pure substance?
There are many different techniques of chemical analysis, and the first step is to just look at the substance and see if you can observe anything non-homogeneous in its appearance. If the substance is a solid you could add water and see if all of it dissolves or just part of it. Chromatography is a useful technique; if you put a liquid on a paper or paper-like material, different substances diffuse at different speeds. Spectrography can be used to identify the constituent elements, which is at least a major clue as to what you are dealing with in terms of possible compounds. Distillation could be used to see if there is a component that has a lower boiling point than other components. A centrifuge can be used to separate out a denser component. And so forth.
What happened to a substance when it goes through a physical change?
A physical change is one in which the shape, size, appearance or state, of a substance may alter, but its chemical composition remains same.
Where do metals go when they corrode?
Despite the appearance, the original metal is still there. The metal has just become a new substance with a new look due to oxidization.
What properties of substances can you observe and how do these properties determine the usefulness or hazards of a substance?
You can observe physical, chemical, and characteristic properties of a substance and can be used to determine the usefulness of a substance by, giving us information about the substance usually using our 5 senses which are physical properties. Or being able to describe the substances ability to undergo changes to its composition to produce one or more new substances, chemical property. Or even just being able to identify whether or not the substance is pure or not can help us determine if the substance is hazardous or not. two other properties I did not mention were the qualitative and the quantitative properties.
Substance X is a molecular compound and is not an acid Based just on this information what can you determine about substance X?
X is not an electrolyte, since you know that it isn't an acid. molecular compounds can be both soluble and insoluble.
What properties of a substance determine how that substance will react when combined with other substace?
Chemical
Is it possible to find a boyfriend who sees you from the inside rather than outside appearance?
It certainly is. Just keep looking or let one find you!
What property of a substance can be determined using a pH indicator?
A pH indicator will test a substance to determine the alkali or acidity, with 7 being neutral on the pH scale.
Is cutting a diamond a physical change?
Crushing a diamond is a physical change because the substance is the same just the appearance isn't,
How man square feet is a 2x8x16?
It is not possible to answer the question. The fact that there are three numbers given suggests it is a 3-dimensional object and it is not possible, with just the side lengths to determine its area. It cannot be a triangle.
Is it always possible to identify something as an element compound. Substance or mixture just by looking at it?
Very rarely is possible; generally to identify an element or compound it is absolutely necessary to realize a deep chemical/physical analysis.
Is it possible to identify something as an element compound pure substance or mixture just by looking at it?
Very rarely is possible; generally to identify an element or compound it is absolutely necessary to realize a deep chemical/physical analysis.
