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
dezoksy [38]
3 years ago
15

Which one is a chemical reaction? Why?

Chemistry
1 answer:
Alex17521 [72]3 years ago
3 0

Answer:

Copper turns green on exposure to air

Explanation:

Liquid water freezes to form ice: Physical change

Reason: Water can melt back when it becomes ice.

Copper turns green on exposure to air: Chemical change

Reason: The copper can not change back from the green state when it turns green.

You might be interested in
Question 2<br> How does an object become negatively charged
Alex
When to positive atoms connect
4 0
3 years ago
Read 2 more answers
How many milligrams of sugar does the milk chocolate bar contain?
topjm [15]

Answer:

18.00

Explanation:

8 0
4 years ago
Paratrooper not hurt while landing,why?​
solong [7]

Answer:

Paratroopers not hurt while landing because when they get to the ground, they keep their knees and feet together helping them to land properly.

hope it helps!

8 0
3 years ago
Explain why iron structures need protection from corrosion while aluminium structures do not?
KiRa [710]
<span>Because aluminium oxide is strong and forms a coating over itself, but iron oxide (rust) will flake away.</span>
4 0
3 years ago
What does every atom of the same element have in common
VikaD [51]
All atoms of the same element have the same
number of protons. Every atom also has a nucleus.
5 0
4 years ago
Other questions:
  • Does ch3ch2nh2 have hydrogen bonding intermolecular forces
    5·1 answer
  • A wave with a frequency of 14 Hz has a wavelength of 3 meters. At what speed will this wave travel
    10·1 answer
  • How are atomic nuclei developed​
    8·1 answer
  • Calculate the percent composition of muscovite mica. Its chemical
    9·1 answer
  • Determine the genotypes of offspring 1-8.
    9·1 answer
  • Which resource is renewable?<br> coal <br> oil<br> steel<br> wind
    14·2 answers
  • Help pls, it's a test about fossils?
    14·1 answer
  • Help ASAP
    6·1 answer
  • (5.50 x 10^6) x (2.16x 10^-2)
    11·1 answer
  • Headphones take in sound waves. This is an example of ...
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!