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
I am Lyosha [343]
3 years ago
15

What phase of Moon can be ONLY seen at night?

Chemistry
2 answers:
AveGali [126]3 years ago
7 0
The phase is Waning Crescent phase.

eduard3 years ago
6 0
I think new moon but not 100% sure
You might be interested in
Two unknown compounds are tested. Compound 1 contains 15.0g of hydrogen and 120.0g of oxygen. Compound 2 contains 2.0g of hydrog
ivann1987 [24]

Answer:

The both compounds are different.

Explanation:

In order to confirm weather both compounds are same we will check the mole ration. If it is same the compounds will be same.

Given data:

For compound 1.

Mass of hydrogen = 15 g

Mass of oxygen = 120 g

Moles of hydrogen and oxygen = ?

Number of moles of hydrogen = 15 g/ 1g/mol = 15 mol

Number of moles of oxygen = 120 g/ 16 g/mol = 7.5 mol

Total number of moles = 22.5 mol

% of hydrogen = 15 /22.5 × 100 = 66.7%

% of oxygen = 7.5 / 22.5× 100 = 33.3%

For compound 2:

Mass of hydrogen = 2 g

Mass of oxygen = 32 g

Moles of hydrogen and oxygen = ?

Number of moles of hydrogen = 2 g/ 1g/mol = 2 mol

Number of moles of oxygen = 32 g/ 16 g/mol = 2 mol

Total number of moles = 4 mol

% of hydrogen = 2 /4 × 100 = 50%

% of oxygen = 2 / 4× 100 = 50%

7 0
3 years ago
How long would it take a car to travel a distance of 260 kilometers if it were traveling at 65 km/hour
Mariulka [41]

Answer:

4 answers

Explanation:

Do simple divison

7 0
3 years ago
Read 2 more answers
What royal scientist used the 29th
olchik [2.2K]

J. Dorman probably was the scientist.

I have a question too. Can you please help me with that? I have a test tomorrow. Thank you!

1. True or False? When you charge your laptop, you are separating charges in the laptop battery.


2. True or False? When you use your laptop, the battery becomes more neutral as it runs low on power.

8 0
3 years ago
What happens in all solutions?A. Two gases are in the same space.
liraira [26]

Answer:

D. Two substances mix evenly without reacting.

Explanation:

Solutions are homogenous mixtures of solutes and solvents.

  • In a solution, the solute particles are distributed uniformly in the solvent.
  • The solute is the substance that is dissolved to make the solution.
  • It is usually present in smaller amount than the solvent
  • The solvent is the dispersing substance that allows the solute to go into solution.
  • The solute could be solid or liquid or gas
  • The solvent could be solid or liquid or gas but most times liquid.
6 0
3 years ago
Which of the following electron transitions in a hydrogen atom emits light of the shortest wavelength? Circle the correct answer
Lilit [14]

Answer:

Transition from n = 4 to n = 1  corresponds to shortest wavelength.

Explanation:

         Process                   \mid \Delta n\mid =\mid \frac{1}{(n)_{final}^{2}}-(\frac{1}{n_{initial}^{2}})\mid

             A                                         0.9375

             B                                          0.75

             C                                          0.0421

             D                                          0.1875

According to Rydberg equation for electronic transition in H-like atoms:

           \frac{1}{\lambda }=R_{H}\mid (\frac{1}{n_{final}^{2}}-(\frac{1}{n_{initial}^{2}})\mid

where, \lambda is wavelength of light emitted or absorbed, R_{H} is Rydberg constant.

So, higher the value of \mid \Delta n\mid, lower will the corresponding wavelength of light.

Hence process A will be associated with shortest wavelength.

4 0
3 years ago
Other questions:
  • what element has the electron configuration of 1s22s22p63s23p64s23d104p65s24d105p66s24f 145d106p67s25f 146d8
    8·1 answer
  • What is a common characteristic of the transitions elements?
    11·1 answer
  • Where does secretion occur in the nephron?
    11·1 answer
  • Is is true or false that ocean currents affect the climate I certain regions on earth​
    7·2 answers
  • A .......... notifies you that danger is present if the directions are not followed.
    6·1 answer
  • Al comenzar la reacción: N2(g) + 2O2(g) ------> 2NO2(g) existe 1 mol de N2 y 2 moles de O2 y al
    7·1 answer
  • PLEASE HELP ME ASAP!!!!
    8·2 answers
  • Compare and contrast the carbon cycle of 1500 and of 2021
    11·1 answer
  • How many moles of Iron Fe, are in 0.054g of iron?​
    10·1 answer
  • If you start with 0.30 m mn2 , at what ph will the free mn2 concentration be equal to 4.6 x 10-11 m?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!