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
notka56 [123]
3 years ago
9

Because ________ change the identity of the substances involved, they are hard to reverse

Chemistry
1 answer:
sveta [45]3 years ago
4 0
Chemical is the answer to the question, but nuclear could also be a valid one since it is nearly impossible to reverse that.
You might be interested in
How did Democritus contribute to the development of the atom?
matrenka [14]

Democritus developed the atomic model. He theorized that atoms were specific to the material which they composed. He also believed that the atoms different in size and shape, were in constant motion in a void, collided with each other; and during these collisions, could stick together.

6 0
3 years ago
What does a ground wire do?
alexgriva [62]

Answer:

A ground wire helps those positive charges get to the ground in a safe, direct and controlled way, where they can be discharged without the risk of electrical shock or fire. Shock Absorber Excess electrical charges are common in any home.

Explanation:

:3

6 0
2 years ago
Help please i give brainlist
shtirl [24]
The order of the answers are as follows:
B
C
D
A
5 0
3 years ago
Sodium thiosulfate, na2s2o3, is used as a "fixer" in black and white photography. identify the reducing agent in the reaction of
aev [14]
Answer is: reducin agent in this reaction is thiosulfate (S₂O₃²⁻).
Balanced chemical reaction: 2S₂O₃²⁻(aq) + I₂(aq) → S₄O₆²⁻(aq) + 2I⁻<span>(aq).
Reducing agent is element or compound who loose electrons in chemical reaction. Sulfur in </span>thiosulfate change oxidation number from +2 to +5 tetrathionate anion (two<span> sulfur </span>atoms in the ion have oxidation state<span> 0 and two atoms have oxidation state +5).</span>
8 0
3 years ago
O2- is the Lewis ______ in the following reaction
matrenka [14]

O^{2-} is the Lewis base in the following reaction:

SO_3(g) + O^{2-}(aq)   →  SO_4^{2-}(aq)

<h3>What is lewis base? </h3>

Lewis base is a species that donates an electron pair.

In the above-given chemical equation, the O^{2-}is the lewis base which is donating an electron pair to the central atom of SO_3 to form SO_4^{-2}.

Hence, O^{2-} is the Lewis base in the following reaction:

SO_3(g) + O^{2-}(aq)   →  SO_4^{2-}(aq)

Learn more about the lewis base here:

brainly.com/question/15570523

#SPJ1

3 0
1 year ago
Other questions:
  • Calculate the percent dissociation of trimethylacetic acid(C6H5CO2H) in a aqueous solution of the stuff.
    15·1 answer
  • What liquid doesn't belong in a science laboratory?
    9·1 answer
  • Give an example of a purely physical change and an example of a chemical change
    8·1 answer
  • When heated, solid copper(ii) carbonate decomposes to solid copper(ii) oxide and carbon dioxide gas. give the balanced chemical
    9·1 answer
  • 38.0 mL of a 0.026 M solution of HCl is needed to react completely with a 0.032 M NaOH solution. Calculate the number of moles o
    5·1 answer
  • a 20ml sample of hcl was titrated with the 0.0220 M Naoh. to reach the endpoint required 23.72 mL of the NaOh. Calculate the mol
    11·1 answer
  • Use hormone and feedback mechanism in the same sentence
    11·2 answers
  • Write an ionic equation of hydrogen peroxide reacting with sodium sulphite​
    5·1 answer
  • A student takes an object with an accepted mass of 120.0 grams and masses it on their
    10·1 answer
  • A what is matter that is always composed of the same combination of atoms
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!