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The identity of a substance (chemical compound) is defined by his chemical formula and molecular structure.
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A physical property of a substance can only be observed if the substance changes into a different substance?
No, a physical property DOES NOT change the identity of a substance. That would be a chemical property which DOES change the identity.
How can the identity of a substance be identified?
By density
What effect does an energy change have on the identity of a substance?
The identity of the substance reamain unchanged.
What is the diffeference between a physical and a chemical change?
A physical change is when a substance changes, but still keeps its identity. When a chemical change occurs, the substance changes its identity.
What is the term for a process that does not change the identity of a substance?
Many physical changes will not alter the identity. However, some physical changes, such as heating or cooling will result in phase changes and so the identity will be different. While ice and water are chemically the same, they are not identical forms of the substance.
What is the identity of a substance that is a solid and its a ionic compound?
"an is an ionic"
In a physical change a substance changes its but not its identity.?
Appearance
What is a property of matter that can be identified without changing the identity of the substance.?
A property of matter that can be identified without changing the identity of the substance is its density. Density is a characteristic property that remains constant regardless of the amount of substance present.
What is the smallest unit of matter that retains the identity of the substance?
If that substance is an element, the smallest part is the atom which, if broken down further into atomic particles, loses its identity.
What effect does observing a substance have on physical properties on a substance?
It can be observed without changing the identity of the object.
How does changing the amount of one substance affect a mixtures identity and a compounds identity?
The compounds identity remain unchanged; but the new mixture is different.
How does changing the amount of one substance affect mixture's identity and a compound's identity?
The compounds identity remain unchanged; but the new mixture is different.
