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
Minchanka [31]
2 years ago
12

How does a physical change obey the law of conservation of mass?

Chemistry
1 answer:
iren2701 [21]2 years ago
5 0
Let's consider water.
Regardless of what form it turns into, the mass should remain the same.
It's the same H20.
Add some heat and it becomes water vapor,
cool it down a bit and it becomes ice.
if you make it just right, it becomes water again.

A chemical change would involve the one or more element(s) changing into a different solution all together.
It cannot be reversed unless you use electrolysis or some other method.
You might be interested in
A sample of a gas has volume 78.5ml at 318.15 K.. What Volume at will the sample occupy at 273. 15 K when the pressure is held c
DochEvi [55]

Charles’ Law

V₁/T₁=V₂/T₂

78.5/318.15=V₂/273.15

V₂=67.4 ml

7 0
1 year ago
3ehehehehe<br> first gets brainlist
Diano4ka-milaya [45]

Answer:

4ehehehehehehe

Explanation:

Thanks......

5 0
2 years ago
Read 2 more answers
someone pls help me with my chemistry test plsss my teacher changes the questions so I can't search them up. its 21 questions so
shusha [124]

Answer:

Correct option is

B

5 liters of CH

4

(g)NO

2

at STP

No. of molecules=

22.4

5

mol=

22.4

5

×N

A

molecules

A) 5ℊ of H

2

(g)

No. of moles=

2

5

mol=

2

5

×N

A

molecules

B) 5l of CH

4

(g)

No. of moles of CH

4

=

22.4

5

mol=

22.4

5

N

A

molecules

C) 5 mol of O

2

=5N

A

O

2

molecules

D) 5×10

23

molecules of CO

2

(g)

Molecules of 5l NO

2

(g) at STP=5l of CH

4

(g) molecules at STP

Therefore, option B is correct.

7 0
2 years ago
Net ionic equation for Calcium hydroxide reacting with ammonium Chloride?
VMariaS [17]

Answer:

Ca(OH)₂ (aq) + 2NH₄Cl (aq) → CaCl₂ (aq) + 2NH₃ (g) + 2H₂O (l)

Ca²⁺ + 2OH⁻ + 2NH₄⁺ + 2Cl⁻ → Ca⁺² + 2Cl⁻ + 2NH₃ (g) + 2H₂O (l)

2OH⁻ + 2NH₄⁺ → 2NH₃ (g) + 2H₂O (l)

3 0
1 year ago
Read 2 more answers
What is true of a sample of gas as temperature is increased? (3 points)
marissa [1.9K]

As temperature increases, the average kinetic energy of a sample of gas molecules decreases.

6 0
2 years ago
Other questions:
  • WILL GIVE 50 POINTS PLEASE HELP!!!!!
    13·1 answer
  • Atomic radius of bromine
    10·2 answers
  • 1 Which best defines concentration?A ratio that describes the amount of solute divided by the amount of solvent or solutionB rat
    11·1 answer
  • The physician has ordered 1.0 g of tetracycline to be given every six hours to a patient . If your stock on hand is 500 mg table
    14·2 answers
  • Where are digestive enzymes found in the body
    9·2 answers
  • Select each correct answer. More than one answer may be correct. Four atoms of hydrogen combine with one carbon atom to form CH4
    5·1 answer
  • The following electron configuration notation represents an atom of which element?
    15·2 answers
  • A blacksmith is in the process of making iron horse shoes. Each shoe, mass of 255.15g, is heated to a bright red (816c), hammere
    9·2 answers
  • Any one free here any gìrl​ bnh-mbxg-bgq / gmeet code​
    11·2 answers
  • What mass of ch4 is consumed when 587. 9 kj of energy is evolved from the combustion of a mixture of ch4(g) and o2(g)? show the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!