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No. The nobel gases and the rare earth metals (gold, platinum) occur as pure substances in nature because they are relatively unreactive. Most materials do not occur as pure substances (typically oxidized) and must be treated to be made pure.
Wiki User
∙ 7y ago
Wiki User
∙ 9y agoMost materials do not occur in nature as pure substances. This is because they are not inert, and in the environment there are many substances that they react with and form compounds.
Wiki User
∙ 12y agoCarbon and oxygen are elements and are pure substances.
Wiki User
∙ 8y agoToday this affirmation is not correct; many compounds have nonstoichiometric forms.
Wiki User
∙ 13y agoNo, they don't occur in pure form.
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Which is a property of a pure substance uniform composition fixed composition varying composition?
A pure substance has a fixed and uniform composition.
What is the homogeneous material with with a variable composition?
No. A pure substances has a definite and constant composition.
If the composition of a material is fixed?
it is called a fixed composition
What is any type of matter with a fixed composition?
This looks like a pretty basic question, although asked out of context, it is tricky. The same composition is called "definite" composition. The more technical term should make us think of the classification of matter. Pure substances have definite composions as opposed to mixtures that have variable composition. Your answer is pure substances. Pure substances can be either compounds, made of 2 or more kinds of atoms or elements make of 1 kind of atom.
Does the composition of a substance always stay the same?
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
Which is a property of a pure substance uniform composition fixed composition varying composition?
A pure substance has a fixed and uniform composition.
What is the homogeneous material with with a variable composition?
No. A pure substances has a definite and constant composition.
What has a fixed composition and is always homogeneous?
A compound has a fixed composition and is always a homogeneous pure substance.
If the composition of a material is fixed?
it is called a fixed composition
What is any type of matter with a fixed composition?
This looks like a pretty basic question, although asked out of context, it is tricky. The same composition is called "definite" composition. The more technical term should make us think of the classification of matter. Pure substances have definite composions as opposed to mixtures that have variable composition. Your answer is pure substances. Pure substances can be either compounds, made of 2 or more kinds of atoms or elements make of 1 kind of atom.
What substance has the simplest pure substance with a fixed composition?
You think probable to a pure stoichiometric compound.
Do pure substances have a fixed boiling and melting point?
yes they have
Does the composition of a substance always stay the same?
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
What is the definition of pure substances?
A pure substance is a substance that consists solely of the same atoms/molecules.So a volume of water that contains only H2O is a pure substance. A block of iron that contains only Fe atoms is pure substance. A pure substance can be composed of atoms or molecules as I said before BUT they have to be exactly the same.A substance that has constant chemical composition and characteristics
What is a pure substants?
A pure substance is any substance with a fixed chemical composition, meaning either a single element or a compound (chemically-bound elements in a fixed ratio).
Why would a chemist find fault with the phrase pure orange juice?
In chemistry, only substances can be termed pure. Orange juice is a mixture of multiple substances because you can change its composition by changing the proportions of substances.
Which of the following is a characteristic of a mixture a has a fixed composition b has varying properties c contains only pure substances d both a and b?
has varafying properties, im taken this test too :) ^ me 2 lol
