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
jasenka [17]
3 years ago
5

Why do you think steeples and roofs might appear green, but a copper square does not?

Chemistry
1 answer:
Masteriza [31]3 years ago
8 0
Because the copper roofs, have been outside for a while and oxidization has occurred.
When metals become oxidized they rust, but when copper becomes oxidized, it turns greenish.
So copper roofs oxidize and turn green from being outside and a copper square doesn’t if it’s inside.
You might be interested in
An ice-skating rink has tubes under its floor to freeze the water. salt water is cooled well below the freezing point of water a
alex41 [277]
Correct Answer: Option g: <span>adding salt to water lowers its freezing point

Reason:
Freezing point is a colligative property. When a non-volatile solution is present in solution, it's freezing point decreases. This is referred as depression in freezing point (</span>ΔTf<span>). Extent of lowering in freezing point is dependent on number of particles present in system. Mathematically it is expressed as:

</span>ΔTf = Kf X m
<span>
where, m = molality of solution
Kf = cryoscopic constant. 

Hence, a</span><span>dding salt to water lowers the freezing point of solution.</span> 
6 0
3 years ago
Which of the following species has the greatest
Dahasolnce [82]
<span>Mn's atomic number is 25 so you have 25 protons and 25 electrons in a neutral atom. Since no charge is shown, the number of electrons is 25
Ni's atomic number is 28 so you have 28 protons and 28 electrons in a neutral atom. This one shows a +3 so there are 3 missing electrons, the number of electrons is 28 - 3 = 25
Cu's atomic number is 29 so you have 29 protons and 29 electrons in a neutral atom. This one shows a +2 so there are 2 missing electrons, the number of electrons is 29 - 2 = 27
Ti's atomic number is 22 so you have 22 protons and 22 electrons in a neutral atom. This one shows a -2 so there are 2 EXTRA electrons, the number of electrons is 22 + 2 = 24 </span>
4 0
4 years ago
Which of the following best describes repulsions?
poizon [28]
A. to push each other away
3 0
3 years ago
Give two reasons why the crude product in most reactions is not pure.
Ostrovityanka [42]

Answer:

1) the product may be contaminated by the solvent

2) side reactions may yield unwanted products

3) some reactants may be present in the product if the reaction was incomplete

Explanation:

It is common in chemistry to pass reaction products through purification processes. This is done for a number of reasons.

First of all, some solvents molecules may be attached to the reaction product. These solvent particles must be separated in order to obtain a pure product.

Secondly, some side reactions also yield products that are isolated along with the desired products and these must be separated accordingly.

Finally, some chemical reactions do not go on to completion. This implies that some reactants may still be isolated alongside the product at the end of the reaction.

3 0
4 years ago
Read 2 more answers
Lab activity - Law of Conservation of Mass with vinegar and baking soda.
lesya [120]

Answer: I BIG DUMB

Explanation:

7 0
3 years ago
Other questions:
  • If 12.35g of CH2O is produced what is the percent yield?
    12·1 answer
  • What is the pH of a 0.100 M HI solution? Is that neutral, acidic, or basic? acidic What is the pOH of a 0.100 M HI solution? Is
    8·1 answer
  • a circuit is electrically _________ when charges are able to flow directly tfrom the cricuit into the ground connection
    14·2 answers
  • Jerome has a tow truck, and he is in charge of moving several vehicles for the city. He wants to explain to his niece how towing
    11·1 answer
  • Which following substances is covalently bonded??
    11·1 answer
  • How does hair an nails develop​
    9·1 answer
  • A point has no demension.​
    8·1 answer
  • Why a real diamond that is made in a laboratory under great heat<br> and pressure is not a mineral.
    15·1 answer
  • 2. What are some strengths and limitations of the constellations
    5·2 answers
  • In the reaction MnO₂ + 4HCI MnCl₂ + 2H₂O + Cl₂, which<br> species is reduced?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!