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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C. Vinyl or neoprene gloves provide protection against hazardous chemicals due to their resistance to chemical exposure. Latex gloves can be permeable, and padded cloth gloves are not designed for chemical protection.
C. Vinyl or neoprene gloves are the appropriate choice for protecting hands from hazardous chemicals. Here's why:
1. Chemical Resistance: Vinyl and neoprene gloves offer excellent resistance to a wide range of chemicals, including acids, bases, solvents, and oils. This resistance creates a barrier that prevents hazardous chemicals from coming into contact with your skin.
2. Latex Allergies: Latex gloves (option A) can cause allergic reactions in some individuals, which can be severe. It's important to avoid latex gloves when working with hazardous chemicals to prevent potential allergic responses.
3. Physical Protection: Padded cloth gloves (option B) are typically designed for physical protection and comfort, not for chemical resistance. They may not provide an effective barrier against chemical exposure, making them unsuitable for this purpose.
4. Versatility: Vinyl and neoprene gloves are versatile and can be used in various laboratory, industrial, and healthcare settings where protection against chemical hazards is necessary.
5. Durability: These gloves are known for their durability and resistance to wear and tear, ensuring that they maintain their protective properties even during prolonged use.
It's essential to choose the right type of gloves based on the specific chemicals you are handling and their compatibility with the glove material. Always consult safety guidelines and material compatibility charts to select the most appropriate gloves for your specific chemical-handling tasks, ensuring the safety of your hands and skin.
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the correct answer would be A. Latex Gloves. vinyl or neoprene gloves will be eaten by most highly toxic chemicals and some lower toxicity chemicals and padded cloth gloves will just soak up the chemical.
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(2) parts per million
(3) grams per Kelvin
(4) joules per gram
Answer:
(2) parts per million
Explanation:
Concentration of a solution can be expressed in terms of parts-per-million (ppm).
ppm is usually used in the context of measuring very small concentrations particularly the amount of contaminants. It represents 1 part of the contaminant in 100000 parts of the total.
It is expressed as:
1 ppm = 1 mg / L
1 ppm = 1 mg/ Kg
B.membrane
C.wall
D.nucleus
planet in the solar system.
Weight
Answer:
weight
Explanation: