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Yes
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Is turning a penny gold a chemical or physical reaction?
Turning a penny gold is a physical reaction rather than a chemical reaction. This process involves coating the penny with a layer of gold, which changes its appearance but does not alter the chemical composition of the penny itself.
Is putting a penny in lemon juice a physical or chemical change?
Putting a penny in lemon juice would cause a chemical change because the lemon juice reacts with the copper in the penny to create copper oxide, which changes the chemical composition of the penny.
Is salt and vinegar removing tarnish from a penny physical or a chemical change?
Removing tarnish from a penny with salt and vinegar is a chemical change. The reaction between the salt, vinegar, and tarnish on the penny results in the formation of new substances that remove the tarnish.
Is a copper penny turning dark a chemical change or physical change?
Chemical.
When a shiny penny turns dull is this a physical or chemical change?
It depends how you mean dull. Dull by wear or dull by oxidation? If it just becomes dull without being touched, then it is a chemical change. Metals readily react with non metals ie Oxygen. This will form a metal oxide layer on the exposed regions. This is why you need to sandpaper down some of the more reactive metals, when using them for conductivity experiments in school, as the oxide reduces conductivity.
Is salt and vinegar removing tarnish from a penny a physical change?
Physical change
Is a blackened penny a physical or chemical change?
Chemical
Is turning a penny gold a chemical or physical reaction?
Turning a penny gold is a physical reaction rather than a chemical reaction. This process involves coating the penny with a layer of gold, which changes its appearance but does not alter the chemical composition of the penny itself.
Is putting a penny in lemon juice a physical or chemical change?
Putting a penny in lemon juice would cause a chemical change because the lemon juice reacts with the copper in the penny to create copper oxide, which changes the chemical composition of the penny.
Is cleaning a penny a chemical change or a physical change?
this is my homework just give the answer already!
Why penny flattened by a hammer is a physical change?
It is a physical change, because it does not change in substance. A penny, whether in its normal state or flattened, is still a penny. Similarly, if you drop a watermelon and it breaks apart, that is also considered to be a physical change because it is still a watermelon. Things are considered to be chemical changes when the substance changes into something new, and is commonly classified as irreversible. When an object rusts, it is considered to be a chemical change. Chemical changes are associated with a temperature change, or a color change or bubbling or something of the sort. Physical changes deal with physical changes in state, for example, ice melting, or in the example you provided, a penny being flattened.
How many different chemicals can clean a penny?
Any medium-strong acidic or alkaline will clean a penny. --- I don't know all of them, but a common one is mixing baking soda and vinegar and dropping the penny into the mixture during the reaction between the acid and the base. Thanks. -Psymonkey21 ---- Alternatively, dropping it into a small glass of coca-cola will do the trink (you will have to leave it for a while. The same is true with vinegar, and lemon juice. ManUtd77 -------------
Why does a penny rust faster in coca cola?
Sugar reaches the copper and they form a physical change
Is salt and vinegar removing tarnish from a penny physical or a chemical change?
Removing tarnish from a penny with salt and vinegar is a chemical change. The reaction between the salt, vinegar, and tarnish on the penny results in the formation of new substances that remove the tarnish.
Why does a penny hold water?
sit the glass of water on the penny
Which mineral can be scratched by glass but not a penny?
The mineral that can be scratched by glass but not a penny is calcite. Calcite has a hardness of 3 on the Mohs scale, which is lower than the hardness of glass (5.5) but higher than that of a penny (2.5).
Is a copper penny turning dark a chemical change or physical change?
Chemical.
