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
Alex17521 [72]
3 years ago
15

What happens to the chemical identity of a substance during a physical change?

Chemistry
1 answer:
klio [65]3 years ago
5 0
Nothing happens because a physical change only changes the appearance of the substance, whereas a chemical change transforms the substance into something completely different.
i.e. (chemical change) wood + fire = ash
(physical change) wood + axe = smaller pieces of wood
You might be interested in
Draw the resonance structures for the conjugate base of Phenol (C6H6O). In one sentence, explain why phenol (C6H6O) has a pKa of
notsponge [240]

Answer:

The four resonance structures of the phenoxide ion are shown in the image attached

The conjugate base of cyclohexanol has only one resonance contributor, while

the conjugate base of phenol has four resonance contributors.

Explanation:

In organic chemistry, it is known that structures are more stable if they possess more resonance contributors. The greater the number of contributing canonical structures, the more stable the organic specie. Since the phenoxide ion has four contributing canonical structures, it is quite much more stable than cyclohexanol having only one contributing structure to its conjugate base. Hence the PKa(acid dissociation constant) of phenol is lesser than that of cyclohexanol. The conjugate base of phenol is stabilized by resonance.

6 0
3 years ago
Kyle is swinging at the playground. As he moves from the top of the swing to the bottom he will _____.
Mekhanik [1.2K]

Answer:

lose potential energy and gain kinetic energy

Explanation:

trust me thats the right answer i am not goo at explanations

8 0
3 years ago
*PLEASE HELP ASAP*
dimulka [17.4K]
I believe its true , because when two elements form different compounds a given mass of one element will combine with the other , during any chemical change atoms arent created or destroyed they are jus rearranged
5 0
3 years ago
9. Suppose that 25.0 mL of a gas at 725 mm Hg and 20°C is converted to standard
storchak [24]

Answer:

V₂ = 22.23 mL

Explanation:

According to general gas equation:

P₁V₁/T₁ = P₂V₂/T₂

Given data:

Initial volume = 25 mL

Initial pressure = 725 mmHg (725/760 =0.954 atm)

Initial temperature = 20 °C (20 +273 = 293 K)

Final pressure = standard = 1 atm

Final temperature = standard = 273.15 K

Final volume = ?

Solution:

P₁V₁/T₁ = P₂V₂/T₂

V₂ = P₁V₁ T₂/ T₁  P₂

V₂ = 0.954 atm × 25 mL × 273.15 K / 293 K × 1 atm

V₂ =  6514.63 mL . atm . K  / 293 K . atm

V₂ = 22.23 mL

8 0
3 years ago
A student was trying to obtain lithium by electrolysis of aqueous lithium chloride. Was he successful?
Wittaler [7]

The student was not successful.

Consider the standard reduction potentials.

Li⁺ + e⁻ ⇌ Li;                       E° = -3.04 V

2H₂O + 2e⁻ ⇌ H₂ + 2OH⁻; E° = -0.83 V

To reduce Li⁺ to Li, the student must apply 3.04 V.

However, it takes only 0.83 V to reduce water to hydrogen.

Thus, the student will get H₂ instead of Li.

6 0
3 years ago
Other questions:
  • True or False?
    15·2 answers
  • What does PO4 stand for?
    7·1 answer
  • Which of the following are elements nd which are compounds H2,HCI,Na,Al2O3,H2O
    12·1 answer
  • What is true about the number of water particles in the pot after the water has been warmed?
    14·1 answer
  • Which description correctly states the difference between a chemical and a physical property? A) Physical properties can only be
    13·1 answer
  • What does one mole of H2O correspond to?
    7·1 answer
  • Suppose you are helping mccarthy choose her sample sites. you have the resources to conduct the study at only 4 sites. pick the
    13·1 answer
  • Identify the structure of a minor product formed from the radical chlorination of propane, which has molecular formula C3H6Cl2 a
    15·1 answer
  • An ate or ite at the end of a compound name usually indicates that the compound contains___________.
    14·2 answers
  • Someone answer these both for me
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!