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
juin [17]
3 years ago
13

Which change is exothermic?

Chemistry
1 answer:
Lina20 [59]3 years ago
6 0
The answer is (1) freezing of water. The energy of different status is increase from solid to liquid to gas. So the change of liquid to solid is exothermic. The other three are endothermic.
You might be interested in
Phylogenetic trees are also called
Arturiano [62]
Hi , the Phylogenetic tree is also called Dendrogram .
8 0
3 years ago
Read 2 more answers
What is the pH of a solution of KOH with a hydroxide concentration of [OH⁻] = 1.10 x 10⁻⁴
olga2289 [7]

Answer:

p[H+] = 10.042

Explanation:

As we know that

pKw = pH + pOH......eq (1)

we will calculate the pH of OH- and then we will calculate the pH of H+

So p[OH-] = - log [1.10 * 10^{-4}]

Solving the right side of the equation, we get

p[OH-]

= - [-3.958]\\= 3.958

Now we know that

pKw = 14.0

Substituting the value of pOH in the above equation, we get -

14.0 = p[H+] + 3.958\\p[H+] = 14 - 3.958\\p[H+] = 10.042

3 0
3 years ago
How are fossils formed
creativ13 [48]
I am sure the answer is D
7 0
3 years ago
If a hot air balloon has an initial volume of 1000 L at 50 ∘C, what is the temperature (in ∘C) of the air inside the balloon if
puteri [66]
<span>(P1/T1) = (P2/T2)


T must be in kelvin first!</span>
3 0
3 years ago
Two species of frog mate in the same pond. One breeds in early summer and one in late summer. This is an example of what kind of
MatroZZZ [7]

Answer:

Pre-zygotic, temporal separation

Explanation:

Reproductive isolation mechanism is of two types:

  • Prezygotic mechanism
  • Postzygotic mechanism

Prezygotic mechanism isolation occurs before fertilization and helpful in preventing formation of fertile offspring.

In frog external fertilization occurs. In the external fertilization, eggs and sperms are released in water and fertilization occur outside the water.

Prezygotic isolating mechanisms may include behavioral isolation, temporal isolation, mechanical isolation, gametic isolation and habitat isolation.

Temporal separation in reproduction is the sexual activity in the same geographical range but in different periods.

Therefore, the given reproductive isolation is pre-zygotic, temporal separation.

4 0
3 years ago
Other questions:
  • Which is a reason to use rate laws?
    8·2 answers
  • Identify the product of radioactive decay and classify the given nuclear reactions accordingly.
    6·2 answers
  • What are two roles living things play in soil formation?
    5·1 answer
  • Calculate % oxygen in CO (NO)3
    15·1 answer
  • What happens if you don't get nutrients in your body
    11·2 answers
  • Balance this equation. If a coefficient of "1" is required, choose "blank" for that box.
    14·2 answers
  • A hypothesis is based on the analysis of data collected in a controlled
    8·2 answers
  • How many valence electrons does Arsenic have?
    9·1 answer
  • Where are you in the process of finding your purpose?
    7·1 answer
  • 11. If two substances react and the temperature of the mixture decreases, the reaction
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!