1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vlada-n [284]
1 year ago
12

Research the compositions of Pennies. What was the composition of each of your Pennies prior to treatment

Chemistry
1 answer:
LenKa [72]1 year ago
7 0

Answer:

History of composition

Years Material Weight (grains)

1944–1946 gilding metal (95% copper, 5% zinc) 48 grains

1947–1962 bronze (95% copper, 5% tin and zinc) 48 grains

1962 – September 1982 gilding metal (95% copper, 5% zinc) 48 grains

October 1982 – present copper-plated zinc (97.5% zinc, 2.5% copper) 38.6 grains

You might be interested in
What Element am I?
rjkz [21]

Answer:

The correct answer is - sulfur.

Explanation:

In the periodic table, there are 18 groups and 7 rows or periods arranged according to their atomic number or electronic configuration. In the question, it is mentioned that the desired element atomic mass is less than the atomic mass of the selenium which is 78.96, and more than oxygen which is 15.99 with 6 electron valence and present in the third row.

As it has 6 valency of electron it must be in the 16 group of the table that comprises the 6 valency and as it is located in the 3rd row it must be sulfur that also has an atomic mass between selenium and oxygen.

6 0
2 years ago
Which rock would be the best source of the mineral garnet?
n200080 [17]
(4) slate because it is the strongest
5 0
3 years ago
Read 2 more answers
Be(OH)2 is solid why?​
pickupchik [31]

Answer:

no it's not solid rather it's an aqueous

Explanation:

B/c Barium hydroxide is used in analytical chemistry for the titration of weak acids, particularly organic acids. Its clear aqueous solution is guaranteed to be free of carbonate, unlike those of sodium hydroxide and potassium hydroxide, as barium carbonate is insoluble in water.

8 0
1 year ago
What is the name of the molecular compound CBra?​
Fudgin [204]

Answer:

i think it is a Cobrotoxin

6 0
2 years ago
Is C2S6 ionic or covalent
Stels [109]

Answer:

covalent

Explanation:

C2S6 is a compound made of 2 nonmetals which makes it covalent

Hope this helps! Plz mark brainliest

8 0
3 years ago
Other questions:
  • How many grams of dry nh4cl need to be added to 2.00 l of a 0.600 m solution of ammonia, nh3, to prepare a buffer solution that
    15·1 answer
  • Look at the questions below and decide which is declarative.
    14·1 answer
  • Which of the following best represents the general form of a chemical equation?
    7·1 answer
  • What is an examole of mass
    14·1 answer
  • +<br> c)<br> FeCl3 +<br> NH4OH<br> Fe(OH)3<br> NHACI
    5·1 answer
  • 6. Calculate the mass of each product when 100.0 g of CuCl react according to the reaction
    5·1 answer
  • Which of the following statements best describes a food web?
    5·1 answer
  • What are some ways that scientists use to model chemical reactions?
    8·1 answer
  • What question would a student need to ask to form a compound with Group 16 nonmetals
    7·1 answer
  • How is the rock cycle related to chemistry??
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!