Cleaning a coin reduces its collector value. If you insist on cleaning it, try Brasso or NevrDull.
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It's best that you don't clean it. Cleaning a coin reduces or kills the collectible value of any coin. The 1887 Indian Head cent is not rare it's actually very common, average circulated coins are $3.00-$8.00.
Oh, dude, it's like super easy. You just gotta like twist the mop head counterclockwise to unlock it, pull it off, and then toss that bad boy in the washing machine. Just make sure to air dry it before you pop it back on. Voila! Clean mop head, clean floors, happy life.
8==========================> ;)
NiCO3 is the symbol for nickel carbonate. It has a molar mass of 118.702 g/mol and its IUPAC name is nickel(+2) cation carbonate.
they are iron nickel cobalt and manganese