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
Tatiana [17]
3 years ago
15

Calculate the frequency of the n = 2 line in the Lyman series of hydrogen.

Chemistry
1 answer:
sattari [20]3 years ago
5 0
Layman series describe the ultraviolet emission lines that the hydrogen atom emits when an electron is moved from a higher energy level to level 1.

For n = 2
The wavelength = 121.5 nm
velocity = wavelength * frequency
frequency = velocity / wavelength
frequency = (3 * 10^8) / (121.5 * 10^9) = 2.469 * 10^15 Hz


You might be interested in
What method of forecasting uses averages to predict future weather?
amid [387]

The climatology method of forecasting uses averages to predict future weather.

Answer: B

Explanation

The satellites and advanced technologies have helped meteorologists to forecast accurately.

There are four types of forecasting methods prevailing now.

They are climatology method, persistence method, analog method and trends method.

The persistence and trends method uses the previous day forecast and compare with today's condition to forecast about future.

The analog method is a complex method where the forecasting is done by comparing present weather condition with a similar condition occurred in the past to predict for future.

The climatology is the simplest method which uses average of weather conditions observed in the previous days to get accurate forecast for future.

4 0
3 years ago
Read 2 more answers
Match the reaction on the top with the corresponding reaction on the left. *
BigorU [14]

Answer:

Matching the reaction on the top with the corresponding reaction on the left:

Explanation:

A) 2Na(s) + 2H2O(l) = 2NaOH(aq) + H2(g)

is Electrolysis breaks down water to form hydrogen and oxygen gas

B) 2H2(g) + O2(g) = 2H2O(g)

is

A bright light is produced when magnesium reacts with the oxygen in air to form magnesium oxide

3 0
3 years ago
A sample of FeCl3 has a mass of 36.45.How many molecules would that be?
stira [4]

Answer: 1.35x 10²³ molecules FeCl3

Explanation: First find the number of moles for FeCl3 using its molar mass which is equal to 162.2 g FeCl3

Convert moles of FeCl3 to molecules by using the Avogadro's number.

8 0
3 years ago
Using the Lewis dot Symbol Illustrate how the atoms are bonded in each of the following ionic compounds; thanks
Gre4nikov [31]
I’m not really sure but i think it’s 2.
6 0
3 years ago
What direction does the energy flow in an exothermic reaction? *
Sedbober [7]
<h3>Answer: <u><em>In an exothermic reaction, heat flows from the system into the surroundings, increasing the temperature of the surroundings.</em></u></h3>

7 0
2 years ago
Read 2 more answers
Other questions:
  • Which of the following is not a characteristic of metals? A. good conductors B. ductile and malleable C. incompressible D. cryst
    10·2 answers
  • An example of an atom that has no charge is one that has
    8·2 answers
  • On the basis of bonding, which of the following compounds has the highest boiling point? A) alcohol B) glucose C) water D) sodiu
    5·2 answers
  • Which is a property of covalent compounds?
    13·1 answer
  • The<br> energy of wind helps a windmill to<br> generate power.<br><br><br> Help me pls.
    12·1 answer
  • The name of an oxyacid has the suffix -ic acid. What is the suffix of the oxyanion?
    15·1 answer
  • Which law is based on the graph that is shown below?
    8·1 answer
  • Answer the following questions: On a 10-fold dilution of a weak acid, the pH will ___________________. On a 10-fold dilution of
    5·1 answer
  • Bunyi pancasila, sila ke lima​
    10·1 answer
  • 29. At what temperature would 70g of NH,Cl dissolve?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!