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no they are not
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∙ 12y ago
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Why are elements and compounds are pure substances and homogeneous mixture are not?
Well, elements and compounds are pure substances. This is because the atoms in an elements are of one type only. Thus making it pure. But in a compound, the ratio of the masses of the combining elements or compounds are fixed. For example, the ratio for hydrogen and oxygen to combine together to form water is 1:8. Therefore the compound is also a pure substance. But homogenous mixtures are not pure substances as the components can be mixed in any ratio. We can make brine solution by mixing any amount of salt and water. There is no fixed ratio. So homogenous mixtures are not pure.
Can pure substances be mixtures?
No. This is because a pure substance is a compound (or element) and can only be separated chemically but mixtures can be separated physically. P.S. This answer was written by a 14 year old from Dearborn Michigan
Is cheese is substances or mixtures?
Cheese is a pure substance
Is medicine pure substance?
Drugs may be pure substances but more frequently they are mixtures.
What can pure substances be classified as?
Pure substances are divided into elements and compounds.
Are helium and gold examples of pure substances or mixtures?
They are actually elements so that is pure substances. Mixtures are more than one type of element that are in the same space but not touching. Compounds are like mixtures but they are touching.
Substances are divided into two classes?
Some people divide matter into pure substances and mixtures. Pure substances are elements and compounds. Mixtures include homogeneous and heterogeneous mixtures. Some people divide matter into homogeneous matter and heterogeneous matter. Homogeneous matter includes pure substances and homogeneous mixtures (solutions). Heterogeneous matter is heterogeneous mixtures.
What is a pure substance that can be broken down into smaller substances called?
whyMatter can be broken down into Pure Substances and Mixtures. Mixtures can't be broken down by anything, however Pure Substances break down to Elements and Compounds.The mixtures whether it is homogenous or heterogoneous can NOT be broken down and be observed because it is a chemical change not a physical change
What are 3 pure elements that are mixtures?
Pure elements cannot be mixtures.
Is neon a pure substance or mixture?
Neon is a pure substance. Elements and compounds are pure substances; mixtures are not.
Are Rolaids pure substances or mixtures?
Mixtures
Carbon and hydrogen are examples of pure substances or?
Elements.
Into what two broad classes can all matter be divided?
Pure substances (elements and compunds) and mixed substances (mixtures, solutions, alloys).
What did Dalton find out about the atom?
1. Most natural materials are mixtures of pure substances 2. Pure substances are either elements or combinations of elements called compounds. 3. A given compound always contains the same proportions by mass of the elements.
Is lead found pure?
Elements are examples of pure substances. Lead is an element, which means lead is pure.
What are a few examples of pure and impure substances around us?
pure substance all elements and compounds like gold, hydrogen, water, methane etc. impure substance mixtures of different substances like milk, soil, sea water, minerals etc
Which term are use to identify pure substances?
Pure substance can be identified as either elements or compounds. Some examples of pure substance that are elements are sulfur and tin. Pure substances that are compounds are sugar and salt.
