yes, dental silver is mixed with something to make it harder.
A silver dollar weighs a little less than an ounce.
In 1887 the U.S. mint made more than one silver coin. Post a new question with a denomination.
These bills were simply called silver certificates rather than silver "coin" certificates. Please see the Related Question for details.
When you coat a silver coin with CuSO4 and apply an electric current, at the anode (where oxidation occurs), the silver coin will lose electrons and dissolve into the solution as silver ions (Ag+). This is because silver is more reactive than copper, so it will dissolve to form silver ions while copper will be deposited onto the coin.
Because they mostly have a collectible value.
It depends on what the coin is. More information is needed. Post new question.
The 1964 Kennedy half dollar is a 90% silver coin but so many were made only a very high grade uncirculated example is worth more than the silver in the coin. The silver value today is about $10.00.
There's no such thing as a U.S. silver dollar coin from 1957.
Only if it's a silver coin will it have more than face value
Other than coin dealers many jewelers buy gold and silver
There's no specific relationship between them. Silver and copper were used for different denominations of coins so the amount of metal in them depended on the coins' denominations and the relative prices of the metals.For example, a bronze Lincoln cent (95% copper) weighed 3.11 gm but a silver Mercury dime (90% silver) weighed 2.5 gm. On the other hand a 90% silver dollar weighed about 26.7 gm.If you're referring to US coins of the same denomination, the answer is that the older silver coins weighed very slightly more than their clad counterparts. The two varieties are the same diameter and thickness so they're compatible in vending, counting, and sorting machines but silver, which made up 90% of a US coin's weight, is slightly denser than copper which currently makes up about 92%. Therefore a clad coin of the same dimensions will be slightly lighter.
You can determine if your coins are made of silver by checking the coin's composition, minting year, and any mint marks. Silver coins typically have a higher silver content than other metals like copper or nickel, and some may even be marked as "silver" on the coin itself. Using a coin scale or magnet can also help determine if your coin is silver.