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No - a star would not be a pure substance. Our understanding of how stars function includes a continuous fusion of hydrogen to form helium and, depending on the star, possibly further fusion of the helium into even heavier elements. Once formed, these heavier elements do not just go away or change back into helium so stars will always be composed of a mixture of hydrogen and the byproducts of fusion.
What else can I help you with?
Is acetone a pure substance or mixture?
pure substance, propanone
Is Methane a mixture or a pure substance?
Methane is a pure substance.
Is a tin a pure substance?
Pure substance
Is a lemon a pure substance?
it is a pure substance.... not
What is a pure substance classified as?
A pure substance is a substance that is constant throughout. Such as water, tin or sulfur.
Is an element a pure substance or a mixture?
pure substance
Is wool a mixture or a pure substance?
pure substance
Is water mixture or pure substance?
Pure Substance
Is neon a pure substance or mixture?
Neon is a pure substance. Elements and compounds are pure substances; mixtures are not.
Is CH3COOH a mixture or pure substance?
CH3COOH is a pure substance. It is the chemical formula for acetic acid.
Is sugar solution a pure substance?
Refined substance can be a pure substance depending on the type of sugar used. If the refined sugar is white, then it is a pure substance. If it the refined sugar is brown, then it is not a pure substance.
Is gold alloy mag wheel a pure substance or mixture?
pure substance?
