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
Kobotan [32]
2 years ago
15

Hi how are you guys doing today???

Chemistry
2 answers:
pickupchik [31]2 years ago
4 0
I’m doing well how about you?
Bas_tet [7]2 years ago
3 0

Answer:

hi

good nd cul how are u too

You might be interested in
Que es la electronegatividad
yanalaym [24]

Answer:

Es la capacidad, el poder de un átomo en una molécula para atraer a los electrones hacia sí.

Explanation:

8 0
3 years ago
What is the wavelength of radiation emitted when an electron goes from the n = 7 to the n = 4 level of the Bohr hydrogen atom? G
Phantasy [73]

Answer:

the wavelength of radiation emitted  is \mathbf{\lambda= 2169.62 \ nm}

Explanation:

The energy of the Bohr's hydrogen atom can be expressed with the formula:

\mathtt{E_n =- \dfrac{13.6\ ev}{n^2}}

For n = 7:

\mathtt{E_7 =- \dfrac{13.6\ ev}{7^2}}

\mathtt{E_7 =-0.27755 \ eV}

For n = 4

\mathtt{E_4=- \dfrac{13.6\ ev}{4^2}}

\mathtt{E_4 =- 0.85\ eV}

The  electron goes from the n = 7 to the n = 4, then :

\mathtt{E_7-E_4 = (-0.27755 - (-0.85) ) \ eV}

\mathtt{= 0.57245\ eV}

Wavelength of the radiation emitted:

\mathtt{\lambda= \dfrac{hc}{0.57245 \ eV}}

where;

hc  = 1242 eV.nm

\mathtt{\lambda= \dfrac{1242 \ eV.nm }{0.57245 \ eV}}

\mathbf{\lambda= 2169.62 \ nm}

4 0
3 years ago
A kayak travels in a lake at an average speed of 35 m/min. If the perimeter of the lake
DanielleElmas [232]

Answer: 4 hours

Explanation:

It takes the kayak 1 minute to travel 35 meters.

Divide the total (8400m) by the amount of meters per minute (35m)

\frac{8400m}{35m} =240minutes

Now convert into hours. (Remember that 1h has 60min)

240min(\frac{1h}{60min})=4h

6 0
3 years ago
Helium is an odorless, colorless gas at room temperature. It is less dense than air. That's why helium balloons float. It is a n
Zolol [24]

Answer:

  • Non-flammable
  • It is the only element that doesn't solidify under ordinary pressure and remains a liquid enven at absolute zero.
  • When it electricity runs through helium it glows a pale peach color.
5 0
3 years ago
I
Damm [24]

Answer: the answer is 18

3 0
3 years ago
Other questions:
  • The material the start all reactions are ______ and the materials that are formed are called _____.
    14·2 answers
  • In nature, rings with ____ carbon atoms are the most abundant
    6·2 answers
  • Which particle has no charge
    12·1 answer
  • Why do elements in the same group have a similar reactivity?
    9·1 answer
  • How many grams of carbon would be present in carbon monoxide that contains 2.6 grams of oxygen?
    13·1 answer
  • Can someone help me pleasee
    12·1 answer
  • Please help me I will give you 10 points​
    7·1 answer
  • What makes a good scientific question??? <br> Plsss help! I will give brainliest! :)
    14·2 answers
  • A house is built with a granite countertop. The heat capacity of the countertop is 158.5 kJ/°C. A hot pan of water is placed on
    9·1 answer
  • What are the two main classes of simple machines?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!