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.
cake
Dissolved sugar is a homogeneous mixture. While sugar is a pure substance in its solid form, when dissolved in water it forms a mixture where the sugar molecules are evenly distributed throughout the solvent.
There are many types of sugar but, if you are describing one type of sugar and not a mixture of many sugars it would be a pure substance.
Mixture
Sugar is considered a pure substance because it is made up of only one type of molecule, sucrose. It does not contain any other substances mixed in, making it a homogeneous material with a consistent composition throughout.
Pure sugar is a compound, which is a pure substance. If you dissolve sugar in water, you will have a homogeneous mixture, which is a solution.
cake
Yes
Pure sugar is a substance (compound).
Solution.
No, sugar in a bowl is not a pure substance. Sugar is a compound composed of carbon, hydrogen, and oxygen atoms arranged in a specific molecular structure. As a result, sugar in a bowl is a mixture of pure sugar crystals and any impurities present.
Dissolved sugar is a homogeneous mixture. While sugar is a pure substance in its solid form, when dissolved in water it forms a mixture where the sugar molecules are evenly distributed throughout the solvent.
There are many types of sugar but, if you are describing one type of sugar and not a mixture of many sugars it would be a pure substance.
it is not pure neither is it a REAL solution...it is an aerosol
Sugar is a pure substance because everything in a sample is alike: a molecule of sugar.
A sugar is a pure substance. Sugar is the generic name for many compounds which are all pure substances. Fructose is a sugar. Glucose is a sugar. Lactose is a sugar. Glucose + Fructose --> Sucrose This is a chemical reaction between 2 sugars to make another, more complex sugar. This reaction if I remember correctly eliminates a water molecule as well as producing sucrose. The reaction occurs in certain plants and is done by an enzyme. Mixing fructose and glucose in a bowl will NOT form sucrose. Refer to the wikipedia article on sugar. It shows the molecular structure of sucrose. A substance cannot have a molecular structure if it is a mixture. It is a compound and compounds are pure substances.
A clear solution of sugar in water is a mixture, not a pure compound, because the proportions between sugar and water can be continuously varied and the two individual compounds can be recovered, for example by vaporizing the water in the solution under vacuum.