7.18 g/cm3

## Do pre 1982 and post-1982 pennies have the same composition that is are they made of the same material?

So for the past 30 years, pennies have been made with an alloy comprised of 97.5% zinc and 2.5% copper, but pennies minted before 1982 are 95% copper and 5% zinc.

## Why do pennies have different masses?

Different metals change the mass of a penny because they have different densities. During World War 2, a copper shortage caused pennies to be made mostly of zinc. And finally, the ratio of copper to zinc was changed in 1982, again changing the mass of a penny.

## What is the mass of 2 pennies?

All U.S. pennies (1-cent pieces) minted since 1982 weigh either 2.5 grams (0.088 ounces) or 3.11 grams (0.109). The 2.5 grams Lincoln Penny is composed of brass (95% copper, 5% zinc), while the 3.11 grams Union Shield is composed of copper-plated zinc (97.5% zinc, 2.5% copper).

## How does the mass of a penny minted in 1982 or before compare with the mass of newer pennies?

Before 1982, pennies were 95% copper and 5% zinc. Then after 1982, the compostion was 97.6% zinc, and 2.4% copper. So this means that the pennies made before 1982 will have a different mass from those made after 1982….Mass of a Penny.

year mass (g)
1980 3.1
2001 2.5

2.95 g

2.27 g.

## What happens to pre and post 1982 pennies in a Bunsen burner flame?

Post-1982 pennies are mostly zinc. We heat the pennies in the flame of a Bunsen burner. As we heat the silver penny the atoms move. The zinc atoms move in between the copper atoms.

## What is the mass of 1 quarter?

Quarter (United States coin)

 Obverse Value 0.25 U.S. Dollar Mass 6.25(Ag); 5.67 (Cu-Ni) g Diameter 24.26 mm (0.955 in) Thickness 1.75 mm (0.069 in)

quarter dollar

nickel

dime

## Why is 5 cents bigger than 10 cents Canada?

Why does one nickel is bigger than a dime in Canada? Because originally 10 cent pieces had silver content and the 5 cent pieces had nickle contentâ€”and silver is much pricier than nickle.

## What is the name of 10 cents?

the United States ten-cent coin, better known as the US dime.

## How many dollars is 5 cents?

The nickel is a US coin worth five cents. Twenty nickels make a dollar. One nickel can be written 5Â¢ or \$0.05. For more on nickels, click here.

100 cents