answersLogoWhite

0

If a substance is a compound, you know exactly what is in it. Scientists say that compounds have a fixed composition. that means that they are always made up from the same atoms, present in the same ratio.

User Avatar

Wiki User

14y ago

What else can I help you with?

Related Questions

Do elements compounds and mixtures have fix melting and boiling point?

Elements have fixed melting and boiling points, while compounds have varying melting and boiling points depending on their composition. Mixtures do not have fixed melting and boiling points, as they are composed of multiple substances which each have their own individual melting and boiling points.


How can one determine the melting point of a compound?

To determine the melting point of a compound, one can use a melting point apparatus. The compound is heated gradually until it changes from a solid to a liquid state. The temperature at which this change occurs is recorded as the melting point of the compound.


Do compounds have fixed temperature?

No. If you think about melting or boiling point, these values are specific and constant for each compound (with some exceptions).


Is an alloy of aluminum has a melting range instead of a melting point is the alloy a compound?

It is a compound. All pure elements have a certain exact melting point.


How can a mixed melting point confirm the identity of an unknown compound?

The melting point is not enough to definitely identify the compound because different compounds may have a similar melting point range. It all depends on the compounds. If you have a compound of acetanilide and flourene, the results will lead to similar melting points of 115 degrees Celsius and 116 degrees of Celsius. The ranges will be similar so it would be hard to definitely identify the compound.


What is the melting point of compound Benzoin?

The melting point of compound Benzoin is approximately 135-137 degrees Celsius.


How is the melting of an impure compound expected to change with recrystallization?

During recrystallization, impurities are removed as the compound is dissolved and then slowly cooled to allow for the formation of pure crystals. As a result, the melting point of the compound should increase after recrystallization because the presence of impurities lowers the melting point of the compound.


What the composition of a melting point mixture?

A melting point mixture typically consists of a 1:1 ratio of the compound being tested and a known standard compound, such as benzoic acid. The mixture is heated slowly to determine the melting point range of the unknown compound. By comparing the melting point range of the unknown compound to that of the standard, the identity or purity of the unknown compound can be determined.


What is lower fixed point?

upper fixed point is a temperature of stem from water boiling and standards atmospheric pressure lower fixed point is the temperature of pure melting ice.


How you know specific compound from another by melting point?

Melting point is a unique characteristic of a substance.


Why is it misleading to identify a solid compound just from a lone melting determination?

Identifying a compound based solely on its melting point is misleading because different compounds can have the same melting point. Additional tests, such as spectroscopic analysis or chromatography, are required to accurately determine the compound's identity. A single melting point determination is not sufficient as it could lead to a wrong conclusion about the compound present.


How is the melting point of an impure compound expected to change with recrystallization?

The melting point of an impure compound is expected to decrease with recrystallization. This is because impurities disrupt the crystal lattice structure, causing a broader melting point range. Recrystallization removes impurities, resulting in a purer compound with a higher melting point.