Oxygen reacts with the copper in the penny, the copper oxidizes and it turns green. The Statue of liberty is made of copper. Over the century, it reacted with oxygen and turned green. This is a chemical change.
Pennies are bronze colored because for many decades they were in fact made of copper or bronze. Those metals were chosen because they were cheap enough that they could be used in enormous amounts to make low-value coins, along with being hard enough to stand up to a lot of wear.When the price of copper went up in the 1980s the Mint had to choose a cheaper metal to avoid having pennies that were worth more than 1¢ each. Zinc was selected, partly because it's not expensive and partly because the zinc lobby has a lot of influence. Zinc is silvery in color, so to prevent confusion with dimes and to maintain the 200-year tradition of "copper" pennies, the zinc coins are plated with copper so that they look almost like their older bronze cousins.
You would get 10 pennies for 2 nickels, as each nickel is worth 5 pennies.
There are 12 ounces in one pound, so 0.75 pounds of American white cheese is equal to 9 ounces.
1 mole is 6.022*1023 atoms, avagradro's number. 1 mole of pennies is equal to 6.022*1023 pennies. 3.5*10-16 mol pennies * 6.022*1023 pennies/1 mol pennies = 210,770,000 pennies If you had 3.5*10-16 moles of pennies, you would have 2.1077*108 pennies.
240 copper pennies equal a pound.
In 1 pound of pre-1982 copper pennies, there are approx 448 grams of weight. Knowing that a copper pre-82 penny weighs 3.11 grams, simply divide the approx 448 grams in 1 pound by the individual penny weight of 3.11grams. The answer to"how many copper pennies does it take to make a pound" is this.It would take 144.05144 copper pennies to weight 1 pound........give or take a couple.One copper cent weighs 3.11 grams, and one pound is 453.59 grams. Do the math, and it comes out to 146 copper cents per pound.
3million
One modern cent weighs 2.5 grams and contains 2.5% copper, which is 0.0625 grams or about 0.000138 lbs of copper per penny. To get one full pound of copper, it would take 7,246 pennies.
145 pennies (pre 1982) 181 (1982 and beyond). 1982 and newer pennies contain mostly zinc and pre 1982 pennies are 95% copper. Some 1982 pennies are 95% copper but not all so if you're buying for copper content stick with pre 1982 to be on the safe side. The above mentioned is pennies in a pound. to figure out pennies "in a pound of copper you must multiply "for pre 1982" 145 X 95% "copper content. Since your 5% short of copper per penny you multiply 145 X 5% to get 7.25. Add 145 to 7.25 to get 152.25 pre 1982 pennies in a pound of copper.If you mean how many pennies can you make from one pound of copper the answer is:There is 2,5% copper in the penny (the rest is mostly zinc)so you need 40 pounds of pennies to have one pound of copper.Each penny weighs 0,080 troy ounces40 pounds is 583,33 troy ounces (see why I like the metric system?)583,3 / 0,8 = 7291.66...About 7293 pennies (almost seventy three dollars in pennies)(some will be used and have corroded if that makes a difference... I do not know)
About 181 pennies per pound.
100 pennies = 1 pound.
1 pound = 20 shillings, 1 shilling = 12 pennies so 1 pound = 240 pennies.
240- there were 12 pennies in a shilling and 20 shillings in a pound.
There were 240 pre-decimal pennies in a pound.
100 pence (=pennies)
Now it is 100 pence to the pound. Pre decimal currency, there were 240 pennies in a pound.