Soap isn't complete dissolvable in the water. That mixed with body oil (also undissovable) begins to build up and form a layer around the tub.
"Ability to rust is a chemical property of iron"
"Words such as rust, corrode usually signify a chemical change." p. 53 Sect. 2.4, from chem book by Prentice Hall
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The ring of scum forming around a bathtub is a physical change, not a chemical change. It is a result of soap scum and minerals in the water accumulating on the surface of the tub due to repeated use.
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No. That is a chemical change. In a physical change, their is no change in chemical composition forming one or more new substances.
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Forming a bar of gold into wire is considered a physical change. This is because the gold's chemical composition remains the same during the process, only its physical shape is altered.
Yes it is a chemical change Because colour is changing and a new substance is forming and it's irreversible.
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Yes. Iron Oxide is forming.
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Yes, it is. This is because there is a physical change. Being a liquid forming a solid. There is a chemical reaction when the hot water is added to the powder, forming a liquid, which is cooled, forming a solid
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Original answer is INCORRECT. Clouds forming in the sky is a physical change because a chemical change requires a change in the chemical composition of a material and the H2O, no matter a solid liquid or gas, is always H20.
Rust forming on a metal gate is a chemical change. It is a result of a chemical reaction between iron, oxygen, and water, which leads to the formation of iron oxide (rust).
No. That is a chemical change. In a physical change, their is no change in chemical composition forming one or more new substances.
I think it is a chemical change Forming underground it is a chemical change Salt forming from a saline solution for example h20 + NaCl --delta-> h2 + O2 + NaCl (This is not a balanced solution) This is a physical change, since there is no change to the Sodium Chloride
It is a chemical change, where a chemical such as oxygen or chlorine combines with a metal, forming an oxide or chloride of that metal.