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
ladessa [460]
2 years ago
13

The first excited state of Ca is reached by absorption of 422.7 nm light. Find the energy difference (kJ/mole) between the groun

d and first excited state. Watch your units. A. 2.83 x 10-7 B. 4.70 x 10-22 C. 283 D. 4.70 x 10-19 E. 457
Chemistry
1 answer:
dedylja [7]2 years ago
5 0

For the excited state of Ca at the absorption of 422.7 nm light,the energy difference  is mathematically given as

E= 4.70x10-22 kJ/mol

<h3>What is the energy difference (kJ/mole) between the ground and the first excited state?</h3>

Generally, the equation for the Energy  is mathematically given as

E = nhc / λ

Where

h= plank's constant

h= 6.625x 10-34 Js

c = speed of light

c= 3x 108 m/s

Therefore

E = 1*(6.625x 10-34 Js)( 3x 10^8 m/s) / ( 422.7x10^-9)

E= 4.70x10-22 kJ/mol

In conclusion, Energy  

E= 4.70x10-22 kJ/mol

Read more about Energy

brainly.com/question/13439286

You might be interested in
Draw a diagram using H+ signs and OH- symbols of a solution that is acidic. Hint: Use the
Dimas [21]

More positive ions shows acidic whereas more negative ions indicates basic solution.

<h3>Which charge show acidic solution?</h3>

That side which has more positive charges is considered as acidic solution while on the other hand, that region where negative charges are present in large number as compared to positive charges is considered as basic or alkaline solution.

So we can conclude that more positive ions shows acidic whereas more negative ions indicates basic solution.

Learn more about charge here: brainly.com/question/25923373

#SPJ1

4 0
2 years ago
Which of the following describes a substance whose atoms all have the same number of protons? . A. Compound . B. Element . C.Ion
jenyasd209 [6]
Out of the choices given, the one that describes a substance whose atoms all have the same number of protons are an element. The correct answer will be B.
8 0
3 years ago
Read 2 more answers
Science question down below
AlladinOne [14]
Answer is in the question light-year. this is the distance light travels in one year. A year is defined as the amount of time it takes for the earth to make its trip around the sun. So if it took 8  light-years  then it took...
8 0
4 years ago
Read 2 more answers
What is the IUPAC name for this molecule above?<br>with explanation step​
Lelechka [254]

Answer:

3,4–diethylheptane

Explanation:

To name the compound given in the question above, the following must be obtained:

1. Determine the functional group of the compound.

2. Determine the longest continuous carbon chain. This gives the parent name of the compound.

3. Identify the substituent groups attached to the compound.

4. Give the substituent groups the lowest possible count by naming them alphabetically.

5. Combine the above to obtain the name of the compound.

Now, we shall name the compound given in the question above as follow:

1. The compound belongs to the alkane family since it has only single bonds.

2. The longest continuous carbon chain is 7 i.e the parent name of the compound is heptane.

3. The substituent group attached to the compound is ethyl (–CH2CH3). There are two ethyl groups attached to the compound.

4. The two ethyl group is at carbon 3 and 4 (i.e number from the right to the upper branch chain).

5. The name of the compound is:

3,4–diethylheptane.

4 0
3 years ago
Air is a _______. a. homogeneous mixture c. compound of oxygen and nitrogen b. heterogeneous mixture d. pure substance
SVEN [57.7K]

a because it was a combination of lots of subtances like CO2, oxygen, nitrogen,... and u cant see air so it is a homogenous mixture

7 0
3 years ago
Other questions:
  • The energy needed to destabilize existing chemical bonds and start a chemical reaction is called ____.
    6·1 answer
  • One of the great upcoming sports in the Olympics is the sport of curling. Write a brief essay on the uses of momentum collisions
    11·2 answers
  • Atomic absorption spectroscopy was used to determine the amount of aluminum in a sample of sunscreen. A blank solution was measu
    14·1 answer
  • What is true of greenhouse gases​
    15·1 answer
  • Which of the following mixtures may be act as a buffer solution?
    15·1 answer
  • Give an example of a mineral that is an element and a mineral that is not an element.
    13·1 answer
  • Choose all that apply.
    8·1 answer
  • Compare and contrast chemical potential energy and elastic potential energy
    12·1 answer
  • ANSWER THIS TO BE MARKED BRAINILEST Water in a beaker measures 250 milliliters. A rock is completely submerged in the water. The
    13·1 answer
  • How many atoms are in 2.00 moles of titanium
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!