This is a little more complicated than a straightforward yes or no. Smell in general is the result of a rather complicated physicochemical process in the nose. It is possible for substances that are not very similar chemically to produce quite similar smells, and it's equally possible for substances that are almost identical chemically to produce quite different smells. One good example is carvone: R-(-)-carvone smells like spearment, while S-(+)-carvone, chemically identical except for being the mirror image, smells like caraway.
TRUE!
Yes, the density of a substance can vary depending on factors such as temperature, pressure, and the purity of the material. Small differences in the arrangement of molecules or the presence of impurities can lead to variations in density between samples of the same substance.
No, the odor of gasoline is a physical property, not a chemical property. Chemical properties describe how a substance interacts with other substances to form new substances, while physical properties describe observable characteristics like color, odor, and texture.
False. Changing the size and shape of pieces of wood is a physical change, not a chemical change. A chemical change involves the alteration of the chemical composition of a substance, while a physical change only affects the physical properties of a substance.
Sawing a board in half is not an example of chemical change. It is an example of a physical change. Physical changes on a substance do not change the substance. When you saw a board in half, the two halves of the boards are still boards- they're not anything else.
TRUE!
False. A boiling point is a physical property of a substance, not a chemical property. Chemical properties describe how a substance interacts with other substances to form new substances, while physical properties are characteristics that can be observed or measured without changing the substance's chemical composition. Boiling point is the temperature at which a substance changes from a liquid to a gas at a given pressure, which is a physical characteristic.
This is False. The colour has to change to be a chemical change/property. If it stays the same, it is physical. Hardness is an example of a physical property. (ex. If I melt a piece of hard steel, it will become soft, liquid probably, but it isn't hard anymore, this change is reversible, therefore a physical change/property)
Yes, the density of a substance can vary depending on factors such as temperature, pressure, and the purity of the material. Small differences in the arrangement of molecules or the presence of impurities can lead to variations in density between samples of the same substance.
No, the odor of gasoline is a physical property, not a chemical property. Chemical properties describe how a substance interacts with other substances to form new substances, while physical properties describe observable characteristics like color, odor, and texture.
true
false
False. Changing the size and shape of pieces of wood is a physical change, not a chemical change. A chemical change involves the alteration of the chemical composition of a substance, while a physical change only affects the physical properties of a substance.
Sawing a board in half is not an example of chemical change. It is an example of a physical change. Physical changes on a substance do not change the substance. When you saw a board in half, the two halves of the boards are still boards- they're not anything else.
I'd say no. Melting just changes the physical properties. Example: A rubber ball. If you melt a rubber ball it will still be rubber, just in a different form.
True. Flammability is a chemical property of matter. It is not a physical property of matter. When wood burns, it changes to ashes, carbon dioxide, water vapor, and other gases. After burning, it is no longer wood.
False. In a physical change, the substance remains the same even though there may be a change in appearance or state. The molecules of the substance do not rearrange themselves to form a new substance.