is pure water a pure substance?
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Water, H2O, is a pure substance, a compound made of hydrogen and oxygen. Although water is the most abundant substance on earth, it is rarely found naturally in its pure form. Most of the time, pure water has to be created. Pure water is called distilled water or deionized water.
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Pure and impure chemical substances A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds. Chemistry. Atoms, elements and the periodic table.
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A pure substance has constant chemical composition. This means that a pure substance can be either an element or a compound. ... The element iron (Fe) is a pure substance, it is made up ONLY of iron atoms.
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Seawater is a Solution (B) Seawater is a mixture of pure water and dissolved ionic substances. Water is a very good solvent. Solvents are liquids that dissolve other substances. Most of the water on earth, including the water in oceans, lakes, rivers, and ponds, contains many solutes.
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Pure substances can't be separated into any other substances while mixtures can always be separated into two or more pure substances by physical means. ... For example, salt water is a solution that is a homogeneous mixture of salt and water.
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Neither air nor water is an element (air is a homogeneous mixture, mostly of nitrogen and oxygen. Water is a pure substance). Compounds can be decomposed into two or more other substances; elements cannot. ... Compounds always contain at least two different elements.
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Pure substance is one that does not have any other substance or impurity present in it and cannot be separated into other kinds of matter by physical processes. It can be an element or a compound. Ice, iron, hydrochloric acid, calcium oxide, mercury are pure substances as they have definite composition.
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Any material that is not a mixture, is called a pure substance. Pure substances include elements and compounds.
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A pure substance has a constant composition and cannot be separated into simpler substances by physical means. There are two types of pure substances: elements and compounds.
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All matter can be classified into two categories: pure substances and mixtures. A pure substance consists of a single element or compound. Iron is formed only of iron (Fe) atoms; table salt is formed only by sodium chloride (NaCl) molecules. A mixture, however, is made up of different compounds and/or elements.
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Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an element.
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An element is a pure substance that cannot be broken down into different substances. In the case of water, the elements are hydrogen and oxygen. ... A compound is defined as a pure substance: formed when two or more elements chemically combine to form bonds between their atoms.
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If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound. If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture.
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Water is pure substance because it is a compound. Coke is a mixture because it has many pure substances in it.
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Au (Gold) is an element. So, it is a pure substance since the one type of atom can't be broken down.
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Examples of Pure Substances. Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). ... All elements are pure substances. Sugar, salt, and baking soda are pure substances that are compounds.
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These impurities include dust, fine sand, clay, dirt, and biological contaminants. Pure water is tasteless, colorless and odorless, but water from rainfall, streams and wells is known to harbor harsh chemicals and elements, including acid and metallic rust elements.