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
Maru [420]
3 years ago
10

Please help it’s due today I will give brainliest

Chemistry
1 answer:
Thepotemich [5.8K]3 years ago
7 0

1st and 4th options are suitable answers, as these 2 changes are not exactly physical changes as it cant return back to original form and as well as its not cooling, so I feel its 1st and 4th options

You might be interested in
Two students are engaged in an argument about whether or not a plant can live independently inside of a sealed jar for up to two
MrRa [10]

Answer:

where's the diagram?

Explanation:

the best answer is student A

3 0
3 years ago
What time is it in California when its 7:00 a.m. in Florida?
bixtya [17]

Answer:

4:00 a.m.

Explanation:

The east coast is 3 hours ahead of the west coast

8 0
3 years ago
Read 2 more answers
3. You have 28.5 grams of Carbon. How many atoms is this?
Anton [14]

1 gram of carbon = 12 atoms ..

As per u r question..

28.5 × 12 = 342..

<h2 /><h2><u>If</u><u> </u><u>this</u><u> answer</u><u> helps</u><u> you</u><u> </u><u>mark</u><u> </u><u>as</u><u> brainlist</u><u>.</u><u>.</u></h2>

6 0
3 years ago
What is the best definition of low electromagnetic energy?
inysia [295]
The best definition of low electromagnetic energy would be A. Low electromagnetic energy has long wavelengths and low frequency.
6 0
3 years ago
A Potassium isotope contains 19 protons, 19 electrons and 21 neutrons. What is its mass number? 40​
OlgaM077 [116]

Answer:

17

Explanation:

you add 19+19 the subtract 21. I think

7 0
4 years ago
Other questions:
  • Describe how formal charges are used to choose between possible molecular structures
    9·1 answer
  • What is the number of moles of solute in 250mL of a 0.4M solution?
    7·1 answer
  • Which of the following are parts of the excretory system? *
    7·1 answer
  • For carbon: What is the effective nuclear charge? In which orbitals do the valence electrons reside? For silicon: What is the e
    10·1 answer
  • Is avocado a fruit or a vegetable?<br><br>(dont me with my question rn xD)​
    6·1 answer
  • Which of the following has the most energy: microwaves, radiowaves, or red light?
    15·1 answer
  • Please help me ill give brainiest to the right answer
    12·2 answers
  • Help plz:))) I’ll mark u brainliest ASAP 10 points
    7·1 answer
  • Nêu và giải thích hiện tượng trong các thí nghiệm sau
    13·2 answers
  • Please answer i’m in a test rn!! Convert 8.1X1025 molecules of water to moles
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!