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
Charra [1.4K]
3 years ago
8

Does a change in energy always indicate that a chemical reaction has taken place? Explain.

Chemistry
1 answer:
Sergeeva-Olga [200]3 years ago
3 0
No

Is water changing from a gas to a liquid a chemical change? No! A change in energy may tell you if a reaction has occurred but not if it’s chemical or not. You have to look for other indicators of a chemical change such as color change ph or formation of a precipitate
You might be interested in
Determine the molar mass of H2O2 (the solute) in a 1.5M aqueous solution of H2O2
Lera25 [3.4K]

Answer:

The molar mass of  H₂O₂ (the solute) in the aqueous solution of

H₂O₂ is 51 g

Explanation:

Given;

H₂O₂ compound

Concentration of aqueous solution of H₂O₂ = 1.5M

The molecular mass of H₂O₂ = (1 x 2) + (16 x 2) = 34 g/mol

Concentration(M) = \frac{Reacting \ mass \ (g)}{Molar \ mass \ (g/m)}

Reacting mass (g) = Concentration x Molar mass

Reacting mass (g) = 1.5 x 34

Reacting mass (g) = 51 g

Therefore, the molar mass of  H₂O₂ (the solute) in the aqueous solution of

H₂O₂ is 51 g

3 0
4 years ago
What must be true for a circuit to light a bulb?
anygoal [31]
Power source (battery/energy) a copper/metal wire, and then a receiver
5 0
3 years ago
Read 2 more answers
Help me pleaseeee, ty if you doo:))
allochka39001 [22]

Answer:

9 is the correct answer

4 0
3 years ago
A substance that does not dissolve in a solvent is said to be:
Snowcat [4.5K]
A is the I think 83388
8 0
3 years ago
HELP ASAP WILL GIVE BRAINLIEST
Zielflug [23.3K]

Answer:

B

Explanation:

I had tried my best to get this answer and I had gotten B

sorry if it was not the right answer but I would recommend B

6 0
3 years ago
Read 2 more answers
Other questions:
  • Propane can be turned into hydrogen by the two-step reforming process. In the first step, propane and water react to form carbon
    12·1 answer
  • Can A fire extinguisher kill A Human Being
    12·2 answers
  • What does the squamous (flattened) epithelial cell do?
    7·2 answers
  • How does an electromagnet create a magnetic field
    14·2 answers
  • The electron affinities of the elements from aluminum to chlorine are -44, -120, -74, -200.4, and -384.7 kJ/mol, respectively. R
    7·1 answer
  • When you look out the window you can see constantly moving air.Air is cycled in order to reach equilibrium
    5·1 answer
  • What element has three valence electrons in the second energy level.​
    5·2 answers
  • What is a chemical change?
    11·1 answer
  • Explain what is "Heredity".
    10·1 answer
  • Hurry and Help for Brainlist
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!