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Because the ammonia solution now contains all of the gunck that was on the penny.
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∙ 15y ago
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What effect does vinegar have on copper?
the effect on copper is the changing color, first a shiny new penny, then after a few days in vinegar the penny turns pinkish and grey and the metalic color is gone. i used this for a science project!
What is the chemical composition of pennies and dimes?
This answer is based on two assumptions: the question is regarding a United States penny and the term 'properties' is directed toward the metallic composition of the coin. According to the U.S. Mint, a penny is made up of 97.5% zinc and only a mere 2.5% copper, the reddish-brown color metal that gives a penny it's distinct appearance.
Why would the increase in the price of copper cause the mint to change the composition of pennies?
Because copper is the chief metal in a US penny. Actually, a penny has cost more to produce than it's face value for quite some time. They make it up in dimes and quarters.
Will fluorite scratch a penny?
no because fluorite is softer than a penny
Why won't a magnet pick up a penny?
because the penny can't be magnetically charged.
What kind of soda changes the color of a penny?
Coke or sprite will change the color of a penny.
Does cola make a penny dirty?
no it does not it cleans the penny a bit.
What cleans a penny from its rust?
i think the vinegar will un rist a penny
Will coke or sprite change the color of a penny?
Yes! In fact they change to a darker color or a greenish bluish color...
What cleans pennies better lemon or lime?
lemon juice cleans a penny better
What clean a penny better lemons or limes?
A lemon cleans a penny better.
Can coke clean a penny better than sprite?
coke cleans penny better
What kind of title can be use for what kind of drink cleans a penny best?
penny bath
How does dish soap clean a penny?
dish soap cleans a penny because it soap
Why does water stay long on a penny?
it will change the color to brown
Does Ammonia Clean a penny?
yes it can
What type of juice cleans a penny best?
lemon juice.(:
