Because the ammonia solution now contains all of the gunck that was on the penny.
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!
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.
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.
no because fluorite is softer than a penny
because the penny can't be magnetically charged.
Coke or sprite will change the color of a penny.
no it does not it cleans the penny a bit.
i think the vinegar will un rist a penny
Yes! In fact they change to a darker color or a greenish bluish color...
lemon juice cleans a penny better
coke cleans penny better
penny bath
A lemon cleans a penny better.
dish soap cleans a penny because it soap
it will change the color to brown
yes it can
lemon juice.(: