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
Rufina [12.5K]
3 years ago
9

What does the symbol "E3" represent?

Chemistry
2 answers:
jenyasd209 [6]3 years ago
4 0
I believe that the answer is B.
shtirl [24]3 years ago
4 0

Answer: The energy of the electron in third energy level.

Explanation: The energy of the electrons depend on the value of n, i.e the value of principal quantum number which tells the shell of the electron.

E=\frac{-13.6Z^2}{n^2}

E= energy

Z= atomic number

n= principal quantum number

Thus E_3 represents the energy of the electron which is present in n=3.

You might be interested in
How are carbon , hydrogen and oxygen alike?
Gnoma [55]
They are all <u>non-metal elements</u>.
6 0
3 years ago
Read 2 more answers
How much heat must be removed from 25.0g of steam at 118.0C in order to form ice at 15C
NemiM [27]

Answer:

-10778.95 J heat must be removed in order to form the ice at 15 °C.

Explanation:

Given data:

mass of steam = 25 g

Initial temperature = 118 °C

Final temperature = 15 °C

Heat released = ?

Solution:

Formula:

q = m . c . ΔT

we know that specific heat of water is 4.186 J/g.°C

ΔT = final temperature - initial temperature

ΔT = 15 °C - 118 °C

ΔT = -103 °C

now we will put the values in formula

q = m . c . ΔT

q = 25 g × 4.186 J/g.°C × -103 °C

q = -10778.95 J

so, -10778.95 J heat must be removed in order to form the ice at 15 °C.

3 0
3 years ago
What two gases make up 99% of the Earth's atmosphere? A. Nitrogen and water vapor B. Carbon dioxide and oxygen C. Carbon dioxide
denpristay [2]

Of the gases listed, nitrogen, oxygen, water vapor, carbon dioxide, methane, nitrous oxide, and ozone are extremely important to the health of the Earth's biosphere. The table indicates that nitrogen and oxygen are the main components of the atmosphere by volume.

so the answer is D. Nitrogen and oxygen

hope this helps!

6 0
3 years ago
According to the phase diagram for water, how is the state of water determined?
ad-work [718]
I believe it’s 2? Because it’s saying read the temperature. Which is basically saying look at what state the water is in. Ex: hot or cold
5 0
3 years ago
Read 2 more answers
1. Why does cabbage juice have different colors at different pH levels?
zlopas [31]

1:Red cabbage contains a water-soluble pigment called anthocyanin that changes color when it is mixed with an acid or a base.

2: Basic

7 0
2 years ago
Other questions:
  • A student mixes 86.3 g of water at 50.3°c with 60.9 g of water at 16.7°c in an insulated flask. what is the final temperature of
    11·1 answer
  • What is the total number of atoms in one unit (molecule or formula unit) of nacl?
    14·1 answer
  • Which mass of gas would occupy a volume of 3dm3 at 25°C and 1 atmosphere pressure?
    15·1 answer
  • Which is NOT a type of fracture?
    14·1 answer
  • Two atoms have the electron configurations 1s2 2s2 sp6 and 1s2 2s2 2p6 3s1. The first ionization energy of one is 2080 kJ/mol an
    5·1 answer
  • Apply the Law of Conservation of Mass to the following problem: During a combustion reaction, 12.2 grams of methane reacts with
    13·1 answer
  • The system of electrons surrounding the nucleus of an atom
    13·1 answer
  • How do I explain this? I'm a little stuck. :/
    11·1 answer
  • What kind of structure do the cations and anions in table salt form
    7·1 answer
  • Name the following hydrate Pb(CIO3)4 . H2O
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!