The rusting of iron is an instance of a chemical change that takes a long time to occur.
Rust is an iron oxide, which is a typically reddish-brown oxide formed by the catalytic reaction of iron and oxygen in the presence of water or air moisture.
Rust is made up of hydrous iron(III) oxides and iron(III) oxide-hydroxide and is commonly associated with refined ironcorrosion.
Rusting is defined as the chemical process by which a red or orange coat forms on the surface of metals. Corrosion includes rusting.
When iron or its alloys are exposed to moist air, rust forms. The hydrated oxide is formed when oxygen and water in the air react with the metal.
(Fe2O3) is the well-known red form of rust, but iron has other oxidation states and can form other colors of rust.
Thus, this is the example of a chemical change that took a long time to occur.
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B. The Neutron
C. The Nucleus
D. The Electron
The nucleus
i am 100% positive, I did my research and the answer is the nucleus
If the substance entering the cell was in higher concentration inside the cell than outside the cell, the type of transport that would be required here is known as Active transport. Thus, the correct option for this question is A.
Active transport may be defined as a type of transport that occurs against the concentration gradient and therefore it is mediated by carrier proteins. In this type of transport, metabolic energy is utilized in order to move ions or molecules against the concentration gradient. It is directly opposite to passive transport.
Active transport results in the accumulation of solute on one side of the membrane. It is different from the carrier proteins mediated facilitated diffusion. This transport decreases the entropy of the reaction.
Therefore, active transport would be required in order to migrate any substance from a lower concentration to a higher concentration. Thus, the correct option for this question is A.
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