is concrete a pure substance?
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Pure substances are substances composed of identical particles. ... Cement is a mixture because it is composed of different types of compound particles. Each of the components of concrete by themselves would be pure substances.
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Pure substances are composed of a single element or compound while homogeneous mixtures are composed of multiple different elements or compounds.
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A substance is considered pure if it contains only a single type of atom, such as gold, or a single combination of atoms that are bonded together, such as a water molecule. Because the hydrogen and oxygen atoms are bonded together as molecules, water that has nothing else in it is considered a pure substance.
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Argon is a pure substance. Argon is an element. Silicon dioxide is a pure substance. It is a compound.
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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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Elements are the purest form of a chemical substance and are composed of only one type of atom. ... Like an element, a compound is considered a pure substance (meaning there is only one type of particle in the substance). A mixture is a combination of two or more different chemical compounds or elemental substances.
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A pure substance is made up of only one kind of particle. For example, table sugar only contains sugar particles and distilled water contains only water particles. Mixtures are made up of pure substances combined together. A mixture is composed of at least two different kinds of particles.
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Concrete is a mixture of water, cement, sand just like mortar. However concrete also has gravel and other coarse aggregates that makes it stronger and more durable. ... Mortar, which is a mixture of water, cement, and sand, has a higher water-to cement ratio than concrete.
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Sodium chloride solid is not a mixture. It is a pure substance... It cannot be physically separated into its components, Na+ and Cl− .
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It is considered a pure substance because it has a uniform and definite composition. All samples of sodium chloride are chemically identical. Water is also a pure substance. Salt easily dissolves in water, but salt water cannot be classified as a pure substance because its composition can vary.
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Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components. ... A mixture is composed of different types of atoms or molecules that are not chemically bonded.
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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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Concrete is a mixture of cement, air, water, sand, and gravel–it's as simple as that! Not exactly. The typical concrete mix is made up of roughly 10% cement, 20% air and water, 30% sand, and 40% gravel. This is called the 10-20-30-40 Rule–though proportions may vary depending on the type of cement and other factors.
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In chemistry, a substance is pure if it has a homogeneous chemical composition. At the nanoscale, this only applies to a substance made up of one type of atom, molecule, or compound. ... Examples of pure substances include iron, steel, and water. Air is a homogeneous mixture that is often considered to be a pure substance.
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Concrete is a mixture of cement, air, water, sand, and gravel–it's as simple as that! Not exactly. The typical concrete mix is made up of roughly 10% cement, 20% air and water, 30% sand, and 40% gravel.
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a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.
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It doesn't have to consist of a single element or type of molecule. Pure hydrogen is a pure substance. So is pure honey, even though it consists of many different types of molecules.