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
mars1129 [50]
3 years ago
6

You are comparing a reaction that produces a chemical

Chemistry
2 answers:
alexdok [17]3 years ago
8 0

Answer:

Sample Response: If the reaction is a chemical change, new substances with different properties and identities are formed. This may be indicated by the production of an odor, a change in color or energy, or the formation of a solid.

MaRussiya [10]3 years ago
7 0

If the reaction is a chemical change, new substances with different properties and identities are formed. This may be indicated by the production of an odor, a change in color or energy, or the formation of a solid.

You might be interested in
What kind of molecule is table sugar? a. Monosaccharide c. Trisaccharide b. Disaccharide d. Octosaccharide
Aleksandr-060686 [28]
Table sugar is a
B. Disaccharide
3 0
3 years ago
Clouds form because water vapor in the air...
DIA [1.3K]
The answer is C. condenses
6 0
2 years ago
Read 2 more answers
6. An environmental chemist needs a carbonate buffer of pH 10.00 to study the effects of acid rain on limestone-rich soils. To p
pishuonlain [190]

Answer:

[Na₂CO₃] = 0.094M

Explanation:

Based on the reaction:

HCO₃⁻(aq) + H₂O(l) ↔ CO₃²⁻(aq) + H₃O⁺(aq)

It is possible to find pH using Henderson-Hasselbalch formula:

pH = pka + log₁₀ [A⁻] / [HA]

Where [A⁻] is concentration of conjugate base,  [CO₃²⁻] = [Na₂CO₃] and  [HA] is concentration of weak acid, [NaHCO₃] = 0.20M.

pH is desire pH and pKa (<em>10.00</em>) is -log pka = -log 4.7x10⁻¹¹ = <em>10.33</em>

<em />

Replacing these values:

10.00 = 10.33 + log₁₀ [Na₂CO₃] / [0.20]

<em> [Na₂CO₃] = 0.094M</em>

<em />

5 0
3 years ago
Why do nitrogen and oxygen form negative ions, not positive ones, in simple binary compounds.
gavmur [86]

Answer:

it is easier for them to have an octet of electrons(8e)

Each ion will: obtain the noble gas structure, each atom has high ionization energy

Explanation:

.

5 0
2 years ago
How many atoms of hydrogen are there in 18g of water ?
Bingel [31]

Answer:

They are 1.204×10^24 atoms of hydrogen present in 18 grams of water. In order to calculate this,it is necessary to compute the number of hydrogen moles present in the sample.

6 0
2 years ago
Other questions:
  • _______________________ turns blood to cherry red and produces a patchy, pinkish color in the lividity of the corpse.a. Carbon m
    7·1 answer
  • Balance the following equation in acidic conditions. Phases are optional. Cu NO3,
    6·1 answer
  • The rising of cold water from deeper layers to replace warmer surface is called
    11·2 answers
  • Which best describes an element? A pure substance. A type of a mixture. A pure compound. An impure substance.
    11·2 answers
  • help!! i tried answering these on my own and turning it into my teacher and she said they were all wrong , can somebody help me
    15·1 answer
  • Muszę napisać wzór sumatryczny wysyłam załącznik
    9·1 answer
  • A metal coin has certain properties that can be measured if the coin were to go from earth to moon the coins will remain the sam
    5·1 answer
  • Need help please I need to select one element for each following families on the periodic table
    14·1 answer
  • Is there a relationship between the locations of earthquake, volcanoes, and plate boundaries? If so, describe the relationship.
    12·1 answer
  • T or F? Sometimes energy is lost during a chemical reaction.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!