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
astra-53 [7]
3 years ago
15

Please help me with this chem question

Chemistry
1 answer:
lana [24]3 years ago
7 0

Answer:

D

Explanation:

A and C are physical changes, while B is a solution, only D is a chemical reaction.

You might be interested in
The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is
Art [367]
Hi! Well the formula of kinetic energy is Ke = 0.5 x M x V^2
0.5 x 0.5 x 10^2
0.25 x 20
5 J (joule)
5 0
4 years ago
Use the standard reduction potentials located in the 'Tables' linked above to calculate the equilibrium constant for the reactio
Paladinen [302]

Answer:

Check the explanation

Explanation:

cell CuE Ecell 0.337 (-0.14) Ecl0.477 V

Since E^o_{ cell } > 0 , the value of \Delta G^o will be negative.

\Delta G^o < 0

\Delta G^o =-nFE^o_{ cell }......(1)

But

\Delta G^o =-RT ln K......(2)

From (1) and (2)

\Delta G^o =-RT ln K=-nFE^o_{ cell }

ln K =\frac{nFE^o_{ cell } }{RT }

ln K =\frac{ 2 \times 96500 \times 0.477 }{8.314 \times \left ( 25+273.15 \right ) }

ln K =37.139

K =1.3468 \times 10^{16}

Hence, the value of the equilibrium constant is 1.35 \times 10^{16}

6 0
3 years ago
Which process turns sediment into sedimentary rock?
MArishka [77]

Answer: compaction, and cementation.

Explanation:

7 0
3 years ago
Read 2 more answers
If a chemical reaction is carried out in four steps and the same reaction can be
Advocard [28]
<h2><em><u>Answer - </u></em>b) Be the same as in the second method</h2>

<h3>Brief explanation:</h3>

Enthalpy is an state function that does not depend on the path followed to carry out the reaction but depends upon the initial and final state of system. In above statement both the reaction are same hence the enthalpy change would also be same. This can also be represent in the form of equation,

<h3> ΔHsys = Hf - Hi</h3>

Where,

  • ΔHsys is change in enthalpy of system
  • Hf is enthalpy of reaction at final state
  • Hi is enthalpy of reaction at initial state

Thank you for joining brainly community.

6 0
3 years ago
When an object kinetic energy changes what happens to the object??
Feliz [49]

Answer:

2. A 3.C

Explanation:

7 0
3 years ago
Other questions:
  • Which property of gases allows you to smell popcorn when you walk into a movie theater? compressibility of gas particles diffusi
    14·1 answer
  • Identify the major functional groups for biomolecules and list compounds where each are found
    7·1 answer
  • Which type of radioactive emission has a positive charge and weak penetrating power?
    11·1 answer
  • Which of the following is true about subatomic particles?
    11·2 answers
  • if a 1.85g mass of zinc produces 475 mL og gas and your balloon weighs 0.574 g and the room temperature is 20.5°C. calculate the
    13·1 answer
  • What did Ernest Rutherford s gold foil experiment demonstrate about atoms?
    14·1 answer
  • Maple syrup, which comes from the sap of maple trees, contains water and natural sugars. It's a clear, brown liquid and the suga
    15·2 answers
  • What is air pollution?
    10·2 answers
  • Question 24
    10·1 answer
  • Why does wind blow?​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!