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Assuming you're asking what a US cent is made of:
Since mid-1982 all US cents have been made of 97.5% zinc with 2.5% copper plating.
From mid-1864 to 1942 and from 1944 to mid-1982 they were bronze, 95% copper and 5% tin and/or zinc
In 1943 they were made of zinc-plated steel due to wartime copper shortages.
From 1857 to mid-1864 they were made of copper alloyed with nickel.
Before that they were pure copper.
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∙ 11y ago
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What causes vinegar to rust a penny?
Pennies are made of zinc plated with copper. Copper reacts with oxygen and water to form copper oxide. This is the tarnish you see on pennies that have been in damp conditions. The only U.S. coins that can truly rust are the 1943 zinc coated steel cents.
What did the penny become less than 100 percent copper?
Over time there is less copper so you have to use zinc instead. A lot had to do with the World War II.
What is a penny piece made from?
First lets define "Penny Piece". A Penny Piece is a quite unattractive lady. If you see any lady that is under a 5.5 on the lady judgment scale, she is in fact a Penny Piece. So a Penny Piece is made from a man and a Penny Piece mating to conceive another Penny Piece.
Is a penny flammable?
A penny is made of metal, so is not flammable.
Why did you have to be so careful about having a clean penny when doing the gold penny lab?
so your penny doesn't get infected with bacteria or germs!!
Is the Canadian penny a pure substance or a mixture?
pure
What is the control on the penny water drops experiments?
In this experiment, the control group would be the penny! The independent variable is the substance/water on the penny, and the dependent is how many drops the penny takes.
How does vineger clean a penny?
Vinegar is a weak acid. If I remember my chemistry lessons of 40+ years ago correctly the action of an acid on a dirty penny should produce some sort of salty substance and water and the penny will then appear clean.
What causes vinegar to rust a penny?
Pennies are made of zinc plated with copper. Copper reacts with oxygen and water to form copper oxide. This is the tarnish you see on pennies that have been in damp conditions. The only U.S. coins that can truly rust are the 1943 zinc coated steel cents.
What did the penny become less than 100 percent copper?
Over time there is less copper so you have to use zinc instead. A lot had to do with the World War II.
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.
What is the singular possessive of penny?
The singular possessive of penny is penny's, as in "penny's worth".
A penny saved ia a penny wasted?
No, "A penny saved is a penny earned".
What is Penny's last name in the book penny from heaven?
Penny's last name in the book "Penny From Heaven" is Falucci.
There are 5 coins 2 nickels and 3 pennies they are in the order of penny nickel penny nickel penny and need to be in the order of penny penny penny nickel nickel you can only move a penny and a nickel?
move the penny on the far right over to the other side on the left and then move the 1st nickel over to the right...hence penny penny penny nickel nickel
What does a penny have on it?
Penny from which country?
What elements are in a penny?
zinc is 97.5% of the penny and copper is 2.5% of the penny
