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
katrin2010 [14]
3 years ago
9

Which of these is an example of physical change?

Chemistry
2 answers:
LekaFEV [45]3 years ago
7 0
<h2>Example of Physical change </h2>

Ice forming and then melting back into water are an example of physical change because the nature of water is liquid. Yet when it freezes then it becomes into solid form. The water which is liquid then freezes to form ice form which is as a solid which is also a physical change.

If we see that when ice which is frozen and in solid form starts to melt by heat then it converts into water which is liquid form. This indicates that water freezes to form ice means liquid to solid therefore its shape changes which is a physical change. When ice melts it becomes solid to liquid it also changes shape and subsequently takes a physical change.

laiz [17]3 years ago
3 0
Lets say you have ice and it's melts that's physical chance it was one thing but now it's another they are still the same thing but it has changed your answer is melting a substance most likely
You might be interested in
Consider the heating curve. In which region are most particles moving the fastest?
Nikitich [7]

The particles are moving fastest in Region D) 5.

As temperature increases, so does the average kinetic energy (speed) of the molecules.

5 0
3 years ago
Read 2 more answers
How many grams of iron are needed to combine with 24.9 g of 0 to make Fe203?
Pavlova-9 [17]

Answer:

Explanation:

Here's where all that equation balancing is going to come into use. Since the main object of the question is not the equation, I'm just going to balance it and use it.

4Fe + 3O2 ====> 2Fe2O3

Step One

Find the number of mols of O2 in 24.9 grams of O2

1 mol O2 = 2*16 = 32 grams

x mol O2 = 24.9 grams               Cross multiply

32x = 24.9 * 1                               Divide by 32

x = 24.9/32

x = 0.778 moles of O2

Step Two

Type the findings under the balanced equations parts. Solve for the number of moles of Fe

4Fe + 3O2 ====> 2Fe2O3

x          0.778

Step Three

Set up the proportion

4/x = 3/0.778            Cross multiply

Step Four

Solve the proportion moles of Fe

4*0.778 = 3x              

3.112   =    3x                      Divide by 3

3.112/3 = 3x/3

x = 1.037 moles of Fe

Step Five

Find the mass of Fe

1 mol Fe = 56 grams

1.037 mol Fe = x            Cross Multiply

x = 56*1.037

x = 58.1 grams

4 0
3 years ago
Convert the following 5cm into metre<br>​
tiny-mole [99]

Answer:

0.05 m

Explanation:

100 cm equals 1 meter

so 5/100

6 0
3 years ago
Read 2 more answers
What are the conjugate acid-base pairs in the following chemical reaction? HBr(aq)+ CH3COOH(aq) ⇌ CH3C(OH)2+(aq) + Br-(aq)
agasfer [191]

Answer:

HBr, CH3C(OH)2 and CH3COOH, Br-

Explanation:

The conjugate acid-base pairs acid reacts with base to form a conjugate acid and conjugate base.

Conjugate acid is formed when a bases receives a proton  (H+) and a conjugate base is formed when an acid losses a proton (H+).

From the given equation:

HBr, CH3C(OH)2 and CH3COOH, Br- are conjugate acid-base pair, where HBr is an acid and CH3C(OH)2 is a conjugate acid while CH3COOH and Br- is the conjugate base.

5 0
3 years ago
Process that changes one set of chemicals into another.
dmitriy555 [2]

Answer:

  • Chemical Reactions

Explanation:

  • A process that changes or transforms one set of chemicals into another.

Source:

  • Section 2.4 Chemical Reactions and Enzymes - Quizlet
7 0
2 years ago
Other questions:
  • Which atom has the weakest attraction for electrons in a chemical bond? A) a boron atom B) a calcium atom C) a fluorine atom D)
    11·1 answer
  • Which gas law states that the pressure of a gas decreases when volume is increased and the temperature is unchanged
    11·2 answers
  • Which of the following phrases best describes a synthesis reaction?
    10·1 answer
  • Draw a structural isomer of ethylcyclohexane that also contains a 6-carbon ring
    11·2 answers
  • If your creating a machine that will clean up trash from the ocean is that adding or removing thermal energy?
    14·1 answer
  • Lesson Question: What is the effect of
    8·2 answers
  • Use the drop-down menu to complete the statement. This is why they have similar Atoms of elements in the same group have the sam
    5·1 answer
  • Using just the valence electrons on each atom determine which 2 atoms should be in the same group?
    5·1 answer
  • Which of the following examples best demonstrates kinetic energy?
    14·1 answer
  • Balancing Chemical Equation<br> Na+Br2=NaBr
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!