Which can be used to identify an unknown substance: mass, melting point density, volume, state of matter
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Ответ:
the characteristics (properties) that can be observed without changing the identity of a substance
Examples of physical properties
mass, color, size, volume, texture, density, state of matter, boiling point, melting point
Ответ:
Melting point
Density
Explanation:
The mass of any two substance can be same so we can distinguish between one Kg of two different substances based on masses.
The volume is again cannot determine the nature of substance.
Similarly with the state of matter we can rule out some possibilities but it cannot be used to identify the nature of a substance.
However melting point is characteristic of a substance. It can be used to identify the unknown substance. In fact in organic chemistry it is one of the property which helps us to determine the nature of compound.
Density can also be used to identify a compound.
Ответ:
b) Negative
c) Positive
d) 0
e) Positive
The origin of heat transfer is the conversion of potential energy of the egg to heat energy.