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
sertanlavr [38]
3 years ago
14

Plz Help Will Upvote

Chemistry
1 answer:
My name is Ann [436]3 years ago
3 0
A.helium<span>Hydrogen is the most abundant element in the Universe; helium is second. However, after this, the rank of abundance does not continue to correspond to the atomic number; oxygen has abundance rank 3, but atomic number 8.</span>
You might be interested in
The process by which water vapor changes to liquid water is called
andre [41]
When water is turned into vapor (a gas), that is called evaporation.

Hope this helps. :)
6 0
3 years ago
what happens to the reaction 2NO2 &lt;----&gt; N2O4 + 57.2 kJ when the temperature of the reaction is increased?
ioda
1) Equilibrium reaction:

<span>2NO2 <----> N2O4 + 57.2 kJ

2) The quantity 57.2 kJ on the right side indicates that the reaction generates heat, i.e. it is exothermic.

When you increase the temperature of an equilibrium chemical  reaction that is exothermic you displace the equilibrium to the left, meaningh that more ractant will be formed..

Answer: the equilibrium will be displaced to the left producing more reatant, NO2.
</span>
7 0
3 years ago
I. Choose the letter of the correct answer. Write your answer on a separate sheet of paper.
omeli [17]

Answer:

,,,

Explanation:

..

6 0
3 years ago
Which of the following is the best example of potential energy?
AveGali [126]

Answer:

A car stopped at the top of a hill

Explanation:

Potential energy is the energy that is stored in an object due to its position relative to some zero position.

therefore, the answer is the first option

=> A car stopped at the top of a hill

hope this helps and is right :)

3 0
3 years ago
Read 2 more answers
What is the pH of 0.550 M H2 SO4
svet-max [94.6K]

approximately 1.3 if you calculate it

7 0
4 years ago
Other questions:
  • the relative molecular mass and formula mass are borth called Mrfor short. what is the difference between them
    14·1 answer
  • What is the ionic bond of magnesium chloride?
    9·1 answer
  • If constant heat is added to ice water, what changes will take place and at what temperatures?
    6·1 answer
  • What is the most efficient way to make up a hepes buffer at 8.5? what starting compounds and reagents will you use?
    11·1 answer
  • Why do the names of some ionic compounds include the charge of the metal ion while others do not?
    6·2 answers
  • Energy flows from the producer level to the ... Level
    15·2 answers
  • What subatomic particles are found in the nucleus and in the electron cloud
    11·2 answers
  • The bond between carbon and hydrogen is one of the most important types of bonds in chemistry. The length of an H—C bond is appr
    13·1 answer
  • Helppppppp plzzzzzzzzz
    11·1 answer
  • Ean rule for [Fe(Co) 2(No)2]​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!