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
Naddika [18.5K]
3 years ago
13

Which type of change does the statement describe? Someone help fast

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

Explanation:

bottom right = physical change

top left = chemical change

top right = physical change

bottom left = chemical change

<h3>A physical change is a change that goes from one form to another and physical changes can be reversed</h3><h3>example: water to ice or air to water</h3><h3 /><h3>A chemical change is when a substance combines with another substance and when it is combined it cannot be reversed</h3><h3>example: burning and or rusting</h3>

You might be interested in
What does the word distal mean?
erica [24]

There are two meanings to the word "Distal"

   Anatomy

  1.    situated away from the center of the body or from the point of attachment.

 

      Geology

    2.   relating to or denoting the outer part of an area affected by geological activity.

       

5 0
3 years ago
Select the correct answer. A sealed bottle is full of air. The volume of the bottle is decreased, but the temperature remains co
Zigmanuir [339]
The answer would be c
3 0
3 years ago
Read 2 more answers
The ph of a 0.0100 m solution of the sodium salt of a weak acid is 11.00. what is the ka of the acid?
Vitek1552 [10]
The answer is Ka = 1.00x10^-10.
Solution:
When given the pH value of the solution equal to 11, we can compute for pOH as
     pOH = 14 - pH = 14 - 11.00 = 3.00
We solve for the concentration of OH- using the equation
     [OH-] = 10^-pOH = 10^-3 = x

Considering the sodium salt NaA in water, we have the equation
     NaA → Na+ + A- 
hence, [A-] = 0.0100 M

Since HA is a weak acid, then A- must be the conjugate base and we can set up an ICE table for the reaction
                             A- + H2O ⇌ HA + OH-
     Initial             0.0100            0       0
     Change        -x                    +x     +x
     Equilibrium    0.0100-x         x       x

We can now calculate the Kb for A-:
     Kb = [HA][OH-] / [A-] 
           = x<span>²</span> / 0.0100-x
Approximating that x is negligible compared to 0.0100 simplifies the equation to
     Kb = (10^-3)² / 0.0100 = 0.000100 = 1.00x10^-4

We can finally calculate the Ka for HA from the Kb, since we know that Kw = Ka*Kb = 1.0 x 10^-14:
     Ka = Kw / Kb 
           = 1.00x10^-14 / 1.00x10^-4
           = 1.00x10^-10
7 0
3 years ago
What is one example of closed economy?
frez [133]
A closed economy<span> is self-sufficient, meaning no imports are brought in and no exports are sent out, the goal being to provide consumers with everything they need from within the </span>economy's borders. An example would be how <span>Brazil's is an unusually </span>closed economy<span> as measured by trade penetration, with exports plus imports equal to just 27.6 per cent of GDP in 2013.</span> 
4 0
3 years ago
Read 2 more answers
Why is water (h2o) considered to be a polar molecule?
Klio2033 [76]
A water molecule, because of its shape, is a polar molecule.
5 0
3 years ago
Other questions:
  • NaOH, KOH, and Ca(OH)2 are examples of (4 points)
    6·1 answer
  • What is an ephemeral stream? A)one that flows only after rainfall B) one that flows only in flat lands C) one that is formed onl
    8·1 answer
  • Which of the following is not a response?only one
    7·1 answer
  • I NEED HELP PLEASE !!!!!
    14·2 answers
  • Express the answers to these problems in the correct number of
    10·1 answer
  • What causes hydrogen bonds to rupture in ice
    5·2 answers
  • Is my answer right?
    9·1 answer
  • It’s due in 5 minutes pls help!!..
    10·1 answer
  • How are silicate minerals different from nonsilicate minerals
    6·1 answer
  • The value of the entropy change for the process N₂ (g) + 3H₂ (g) --&gt; 2NH₃ (g) is ________.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!