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chemical changes can corrode, or wear away metals used in industry and construction. to prevent the metals from being weakened, they are often covered with a layer of another substance. Galvanized steel, for example, has a thin coating of zinc, a metal that's more reactive than steel. by reacting itself, the zinc prevents corrosive materials from reacting with the steel. steel is sometimes covered with a thin layer of chromium, a nonreactive metal. this seals the steel against corrosive chemicals.
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∙ 12y ago(Your welcome. Please do not say thank you. I'm glad i got to answer it)
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Is a tin can rusts a physical or chemical change?
Yes, it is, because the chemical composition of the outside changes due to oxydation.
Is Stomach acid dissolving pizza a physical or chemical change?
There are some chemical aspects:base is made from flour and yeast,so the reaction between them is a chemical change.The cooking of the pizza is also a chemical reaction, because it cannot be undone.There are also some physical aspects, e.g.Making the doughgrating the cheesemelting the cheese
Why is fizzing and foaming a physical and chemical change?
When something fizzes and foams, it's producing some sort of gas within it, thus it's going from a solid/liquid to a gas (a physical change). But, this gas is likely not the same material that it came from. it's just a byproduct of a chemical reaction with in it (a chemical change).
Is mixing coca powder with water a physical or chemical change?
To call it an physical or chemical change, we first need to describe both of them briefly. A physical change is the one which does not change the chemical properties of a substance. A chemical change is the one which changes the chemical properties of a substance. Whether they can be recovered or not is not of importance here. So if you mean to dissolve some powder in hot water such that it does not make any reaction with water, then its a physical change. (Mixing flour or salt or sugar powder are examples) However if you put some powder in hot water which creates a reaction and the molecules of that powder are no longer the same, then it would be a chemical change. (Adding tiny sodium or potassium pieces to water are examples)
Is a well cooked steak chemical or physical change?
Cooking involve many chemical processes but also some physical processes as evaporation or melting.
Is converting iron to a steel alloy a physical change?
It is a physical change as an alloy is a solid solution made from various metals. As you can still separate these different metals after the alloy is made it is a physical change and not a chemical change.
How metals change due to exposure to the air?
Some metals, namely iron, oxidize (that is the metal loses electrons) in the presence of air. This causes a chemical change to iron oxide, which is responsible for rusting.
Do acids react with certain chemicals to produce chemical change?
Yes, most notably acids will react with bases and some metals.
Which chemical family contains multivalent metals?
Some of the transition state metals are multivalent.
What are some metals that do not have chemical formulas?
The metals by themselves do not have chemical formulas, they have chemical symbols which are shown on the periodic table of the elements. They only have chemical formulas if they are chemically bonded to another element, usually a nonmetal.
What are some ex of chemical reaction occurs with metals?
rust on a car
What change to a metal is a chemical change?
Corrosion. Oxidation, combination of the surface atoms with oxygen, called rust in the case of iron, is one form of corrosion. Aluminum and many other metals oxidize. Combination with sulfur is also common, particularly for copper compounds. All metals except gold corrode in some fashion.
When a shiny penny turns dull is this a physical or chemical change?
if it goes dull and when you polish it it is shiny again that is a physical change, but if it rusts then it is a chemical reaction between the oxygen in the air and the metal changing to a metal oxide. (if you rub the rust off this is not reversing the change it is just getting rid of the metal oxide).
Is toasting bread a physical or chemical change?
It is a chemical change because some compounds from bread are thermally decomposed.
Is a cooked hot dog physical or chemical change?
CHEMICAL:)
What is the chemical name of the product when metals react with air?
The most prominent constituent in the atmosphere which reacts with some metals, though not all, is oxygen. The resultant chemical would be an oxide of the metal concerned.
What are chemical properties of metal?
Some chemical properties of metals are that they have good electrical and thermal conductivity. Metal also form positive ions or cations and ionic bonds. When exposed to air and moisture, many metals tend to corrode.
