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
MAVERICK [17]
2 years ago
15

Displacement Reactions involving Acids Reaction Observations (Before mixing) Both clear Classify Reaction (Select all that apply

) Observations (After mixing) Boiling, tube is hot, clear no color changes N*a_{2} * C * O_{3} * (aq) + H_{2}*S * O_{4} * (aq) No reaction occurred Endothermic Exothermic Gas producing Neutralization Precipitation Redox

Chemistry
1 answer:
Soloha48 [4]2 years ago
7 0

A reaction in which heat is evolved is an exothermic reaction while a reaction in which heat is absorbed is an endothermic reaction.

In the first case; Na2CO3 + H2SO4, we can see that this is an acid - base reaction therefore it is a neutralization reaction. Since the tube was hot after reaction, heat is given off so it is exothermic.

In the second case; NaOH + H2SO4, we can see that this is an acid - base reaction therefore it is a neutralization reaction. We are told that the tube is not hot but we don't know the initial temperature of the tube or if it was colder than it's initial temperature so we can not make any inference regarding whether the reaction is endothermic or exothermic.

Lastly, the reaction, NaCl + HC2H5OH does not occur so we mark "no reaction". We are told that the tube is not hot but we don't know the initial temperature of the tube or if it was colder than it's initial temperature so we can not make any inference regarding whether the reaction is endothermic or exothermic.

Learn more: brainly.com/question/11902331

You might be interested in
If you pump air into cycle tyre a slight warming effect is noticed at valve stem why
SSSSS [86.1K]
Probably the kinetic energy of rubbing the pump against the valve, combined with the increase in gas pressure in the tire itself.
8 0
3 years ago
Why does brining a turkey make it juicier?
olya-2409 [2.1K]

Answer:

hope this answer will help you.

6 0
2 years ago
ALGEBRA 1 SEM 1
olganol [36]

Answer:

This is the best answer your mom

Explanation:

6 0
2 years ago
What is the energy of a photon that emits a light of frequency 6.42 x 1014 Hz?<br><br>​
svetlana [45]

Answer:

Option B. 4.25×10¯¹⁹ J

Explanation:

From the question given above, the following data were obtained:

Frequency (f) = 6.42×10¹⁴ Hz

Energy (E) =?

Energy and frequency are related by the following equation:

Energy (E) = Planck's constant (h) × frequency (f)

E = hf

With the above formula, we can obtain the energy of the photon as follow:

Frequency (f) = 6.42×10¹⁴ Hz

Planck's constant (h) = 6.63×10¯³⁴ Js

Energy (E) =?

E = hf

E = 6.63×10¯³⁴ × 6.42×10¹⁴

E = 4.25×10¯¹⁹ J

Thus, the energy of the photon is 4.25×10¯¹⁹ J

3 0
3 years ago
Read 2 more answers
What does electron have to do with color ? In one sentence
Goryan [66]

Electrons absorb energy, as they absorb energy they go from ground state to excited state and to return to ground state electrons release energy in the form of photons producing that color.

4 0
3 years ago
Other questions:
  • The study of all chemicals containing carbon
    8·2 answers
  • A pH increases, what happens to the hydroxide ion concentration?
    12·1 answer
  • There are 81 amino acid residues in the precursor molecule of bovine insulin. What is the least number of bases that must be in
    6·2 answers
  • How does the reaction, A + BC ⇌ AB + C, differ from the reaction, N2 + 3H2 ⇌ 2NH3 + energy, by which ammonia is synthesized?
    13·2 answers
  • A 25.00 mL sample of sulfuric acid solution from an automobile battery reacts completely with 87.42 mL of a 1.95 M solution of p
    9·1 answer
  • A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 8.10kg of water at 33.9 degree
    10·1 answer
  • 9. How many protons, neutrons, and electrons does 35C1l- have?
    5·1 answer
  • Please help! you are amazing! also brainliest :)
    12·2 answers
  • Weather can change from day to day, but does not
    5·2 answers
  • Katie's teacher has asked her to identify an unknown
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!