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
Nataly_w [17]
3 years ago
10

In the crystal structure of potassium oxide, the oxide ions are coordinated by eight potassium ions. part a what is the coordina

tion number of potassium? g
Chemistry
1 answer:
Ugo [173]3 years ago
5 0
Potassium oxide has the antifluorite structure. The antifluorite structure have compounds with the stoichiometry X₂Y, where X is the cation and Y is the anion. In the antifluorite structure <span>positions of the </span>cations<span> and </span>anions<span> are reversed relative to their positions in calcium fluoride.</span>
Potassium ions coordinated to 4 oxide ions, <span>potassium ions are all in the tetrahedral holes.</span>
You might be interested in
How many moles of Ar atoms are there in 202 L of Ar gas at STP? A) 1.20 x 1024 mol B) 1.11 x 10-1 mol C) 4.52 x 103 mol D) 9.02
Alina [70]

Answer:

4.52 x 103 mol

Explanation:

5 0
3 years ago
Read 2 more answers
Explain TWO ways that your body changes waste product levels to maintain an internal<br> balance?
aniked [119]
Regulates the volume and pH of the internal environment. The human excretory system maintains homeostasis by removing metabolic waste such as water, salt and metabolite concentrations in the blood.
4 0
3 years ago
Determine the value of the equilibrium constant (report your answer to three significant figures) for the following reaction if
Debora [2.8K]

Answer:

6.25e-6 is the value of the equilibrium constant

Explanation:

we have this equation

PbBr(s) ----- Pb^{2+}(aq)  + 2Br(aq)

When at a state of equilibrium,

we have the concentration of Pb^2+ to be 0.01

we have the concentration of Br^- to be 0.025

the equilibrium constant concentration of both pure solids and liquid s are said to be equal to 1

[PbBR2] = 1

such tht

Keq = [Pb^2+] x [Br-]^2

we already know the values of these from the above.

0.01x0.025^2

= 0.01 x 0.000625

= 0.00000625

= 6.25 x 10^-6

= 6.25e^-6

5 0
3 years ago
How are tumor cells different from normal cells
In-s [12.5K]

Tumor cells differ from normal cells in that A) Mitosis is not regulated in tumor cells.


This is seen when tumors grow to large amounts rather quickly. Mitosis is not regulated, and therefore the cells continue to multiply and that is when we are able to see and feel a palpable cancer mass - their growth is uncontrolled.

3 0
3 years ago
Calculate the energy for the transition of an electron from the n = 2 level to the n = 5 level of a hydrogen atom.
katovenus [111]

The energy for the transition:

The energy for the transfer of an electron from the n=2 level to the n=5 level of a hydrogen atom is 4.57 x 10^{-19} J

Calculation:

We are aware of the energy levels as n=2 and n=5. So, we may determine the wavelength of the photon released by the electron during this transition using Rydberg's equation:

1/λ = R x (1/n^{2}_{final} - 1/n^{2} _{initial})

where,

1/λ = the wavelength of the emitted photon,

R = Rydberg's constant, 1.0974 x 10^{7} m^{-1}

n_{final} = the final energy level = 5

n_{initial} = the initial energy level = 2

Now, put the value in the above equation, we get,

1/λ = 1.0974 x 10^{7} m^{-1} x ( 1/5^{2} - 1/2^{2} )

1/λ = 1.0974 x 10^{7}m^{-1} x (-0.21)

1/λ = -0.23 x 10^{7}m^{-1}

λ = 4.347 x 10^{-7}m

Since, E = hc/λ

where,

h = Plank's constant = 6.626 x 10^{-34} Js

c = speed of light = 3 x 10^{8} m/s

So, the transition energy for your particular transition is,

E = 6.626 x 10^{-34} x 3 x 10^{8} / (4.347 x 10^{-7})

E = 4.57 x 10^{-19} J

Learn more about Rydberg's formula here,

brainly.com/question/13185515

#SPJ4

4 0
2 years ago
Other questions:
  • One reason it is important to carefully document the services you provide your client is to
    6·1 answer
  • I NEED HELP ASAP! WILL MARK AS BRAINLIEST
    15·2 answers
  • What is the pOH of a 0.025 M [H+] solution? A.0.94 B.1.60 C.12.40 D.13.06
    15·1 answer
  • Balance this equation: Al+ HNO3 ---- H2 + Al(NO3)3​
    12·1 answer
  • How many kinds of horses are there in the world? Give me a real number, plz its for a magazine article!
    10·2 answers
  • What quantity of heat is transferred when a 150.0g block of iron metal is heated from 25.0°C to 73.3°C? What is the direction of
    12·1 answer
  • A solution of ammonia NH3(aq) is at equilibrium. How would the equilibrium
    6·1 answer
  • a couple of pennies have a mas of 5.2 grams. Asuming that the pennies are 100% percent copper,how many moles of copper are the p
    7·1 answer
  • "Show a general equation for polymerisation"
    6·1 answer
  • When a piece of metal is irradiated with UV radiation (λ = 162 nm), electrons are ejected with a kinetic energy of 3.54×10-19 J.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!