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
REY [17]
2 years ago
5

A chemist has synthesized two new dyes based on the molecular structure of plant-based dyes. The lowest energy absorption line f

or the first dye is light in the visible region at 530 nm. The lowest energy absorption line for the second dye is light in the visible region at 645 nm. Based on this evidence, which molecule has the larger HOMO-LUMO gap?
1. The dye that absorbs at 530 nm
2. There is not enough information given to predict
3. The gap is the same, because they both absorb in visible region
4. The dye that absorbs at 645 nm
Chemistry
1 answer:
baherus [9]2 years ago
7 0

Answer:

1. The dye that absorbs at 530 nm

Explanation:

With a larger HOMO-LUMO gap, there's also a higher absorption energy, so this means that the dye with the higher absortion energy has the larger HOMO-LUMO gap.

The relationship between energy and wavelenght can be expressed by the formula E = hc/λ, this means that the <em>lower</em> the wavelenght, the <em>higher</em> the energy is. So the dye that absorbs at a lower wavelenght has a larger HOMO-LUMO gap.

You might be interested in
What does autosexual mean?
kolezko [41]

Answer:

Autosexuality means people are more attracted to themselves than to others and may prefer masturbation to sex with a partner.

6 0
2 years ago
Read 2 more answers
What type of reaction is this?<br> N2 + 3H2<br> 2NH3
Levart [38]

Answer:

It is a combination reaction; nitrogen and hydrogen combine to form ammonia.

Explanation:

7 0
3 years ago
Which of the ffamily contains liquids, solids and gases?
Naddik [55]
The hydrogen one because who doesnt like snoballs'

7 0
3 years ago
A buret is filled with 0.1517 M A 25.0 mL portion of an unknown acid and two drops of indicator are added to an Erlenmeyer flask
erik [133]

Answer:

Molarity of Unknown Acid = 0.1332 M

Explanation:

Data for solving problem:

Molarity of base in buret (M₁)= 0.1517 M

volume of the acid in Erlenmeyer flask (V₂)= 25.0 mL

Volume of the base in the buret (V₁) = final volume of buret - initial volume in buret

final volume of buret = 22.5 mL

initial volume in buret = 0.55 mL

So

Volume of the base in the buret (V₁) = 22.5 mL -0.55 mL = 21.95 mL

Volume of the base in the buret (V₁)  = 21.95 mL

Molarity of Unknown acid in the Erlenmeyer flask (M₂) = To be find

Explanation:

It is acid base titration and  formula for this titration is as follows:

Molarity of base x Volume of base = Molarity of acid x volume of acid

it can be written as

M₁V₁ = M₂V₂ -------------------- equation (1)

we have to find M₂

so by rearrangment the equation (1)

M₁V₁ / V₂ = M₂ ------------------ equation (2)

put the values in equation in equation (2)

M₂ = 0.1517 M x 21.95 mL / 25.0 mL

M₂ = 3.3298 /25.0

M₂ = 0.1332 M

so the Molarity of Unknown acid is <u>0.1332 M</u>

5 0
3 years ago
How many core electrons are in a ground state atom of selenium?
Harman [31]
Electrons in an atom can be classified as core electrons and valence electrons. Valence electrons are those electrons which are present in valence shell and participates in bond formation. While, Core electrons are all remaining electrons which are not present in valence shell, hence not take part in bonding.

Atomic number of Selenium (Se) is 34 hence it has 34 electrons with following electronic configuration;

                          1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁴

From electronic configuration it is found that the valence shell is 4, and the number of electrons present in valence shell are 6. So, 

             Core Electrons  =  Total Electrons - Valence Electrons

             Core Electrons  =  34 - 6

             Core Electrons  =  28

Result:
          There are 28 core electrons in Selenium.
3 0
3 years ago
Other questions:
  • 1. Write the complete balanced equation for the following reaction:
    12·1 answer
  • Explain why the quantum number set (2, 2, -1, -½) is not possible for an electron in an atom.
    12·1 answer
  • Help please!!!!!!I have to have 20 caracters
    9·2 answers
  • What is the parts of the Transverse wave and longitudinal wave
    8·1 answer
  • Which of the following halogens would have the highest melting point?
    13·1 answer
  • A sample of neon occupies a volume of 752 ml at 25 0
    5·1 answer
  • BRAINLIEST ASAP! PLEASE HELP ME :)<br><br> What ancient Greek theory did Robert Boyle help dispel?
    15·1 answer
  • Based on the electron configuration of the two atoms, predict the ratio of metal cationic (+) atom to nonmetal anionic (-) atom
    7·1 answer
  • 3. Calculate the amount of sodium carbonate required to neutralize 50 cc of N-H2SO4.​
    8·1 answer
  • A block of ice is placed outside on a hot summer dayDescribe the changes in particle motion and the corresponding changes in ene
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!