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
salantis [7]
3 years ago
12

Which electron requires the most ionization energy - the 1st, 2nd or 3rd electron on a sodium atom? Support your answer using at

omic structure. (EX: energy levels, nuclear charge, attraction).
Chemistry
1 answer:
kicyunya [14]3 years ago
6 0

Answer:

3rd

Explanation:

I dont know how to to this explanation to be honest

You might be interested in
Find the pHpH of a solution prepared from 1.0 LL of a 0.15 MM solution of Ba(OH)2Ba(OH)2 and excess Zn(OH)2(s)Zn(OH)2(s). The Ks
charle [14.2K]

Answer:

pH  = 13.09

Explanation:

Zn(OH)2 --> Zn+2 + 2OH-   Ksp = 3X10^-15

Zn+2 + 4OH-   --> Zn(OH)4-2   Kf = 2X10^15

K = Ksp X Kf

  = 3*2*10^-15 * 10^15

  = 6

Concentration of OH⁻ = 2[Ba(OH)₂] = 2 * 0.15 = 3 M

                Zn(OH)₂ + 2OH⁻(aq)  --> Zn(OH)₄²⁻(aq)

Initial:           0             0.3                      0

Change:                      -2x                     +x

Equilibrium:               0.3 - 2x                 x

K = Zn(OH)₄²⁻/[OH⁻]²

6 = x/(0.3 - 2x)²  

6 = x/(0.3 -2x)(0.3 -2x)

6(0.09 -1.2x + 4x²) = x

0.54 - 7.2x + 24x² = x

24x² - 8.2x + 0.54 = 0

Upon solving as quadratic equation, we obtain;

x = 0.089

Therefore,

Concentration of (OH⁻) = 0.3 - 2x

                                    = 0.3 -(2*0.089)

                                  = 0.122

pOH = -log[OH⁻]

         = -log 0.122

          = 0.91

pH = 14-0.91

     = 13.09

4 0
3 years ago
Estimate your de Broglie wavelength when you are running. (For this problem use h = 10^−34 in SI units and 1 lb is equivalent to
AlekseyPX

Answer:

A. your running speed 1.5 m/s

B. your mass 70 kg

C. your de Broglie wavelength 6.32x10^{-36}m

Explanation:

Hello there!

In this case, since the equation for the calculation of the Broglie wavelength is:

\lambda =\frac{h}{m*v}

We can assume a running speed of about 1.5 m/s and a mass of 70 kg, so the resulting Broglie wavelength is:

\lambda =\frac{6.626x10^{-34}kg\frac{m}{s} }{70kg*1.5\frac{m}{s} }\\\\\lambda =6.32x10^-36m

Best regards!

7 0
3 years ago
What is the function of the sensory and motor nerves?
den301095 [7]
Sensory nerves gather information of the environment and send it to the brain, and motor nerves tell muscles to contract, thereby making you move.

\^-^/
8 0
3 years ago
you can work a total of no more than 20 hours per week at you two jobs. Baby-sitting pays $5 per hour,and your job as a cashier
Dovator [93]
Where x represents the number of hours working as a babysitter and y represents the number of hours working as a cashier...

5x + 6y <u><</u> 90
x + y <u>></u> 20
<u />
5 0
3 years ago
Suppose that the physical properties of two stars are identical in every way --- for example, same distance, same mass, same tem
larisa [96]

Answer:

By measuring it's Radical velocity using Doppler Phenomenon...

Explanation:

It is done by measuring the absorption spectrum produces by a star as a result of measuring Doppler's relative wavelength. The star with the lower speed must have lower absorption spectrum extent as compared to the faster one.

4 0
3 years ago
Other questions:
  • Which of the following could produce an ocean?
    7·1 answer
  • How many grams of sodium benzoate, C H CO Na, have to be added to 1.50 L of a 0.0200 M solution of benzoic acid, C H CO H, to ma
    5·1 answer
  • How can you determine the frequency of a wave when the wavelength is known?
    13·1 answer
  • What is the name of the instrument used to measure the pressure of a contained gas? *
    6·1 answer
  • How many conversion factors would you need to use to find the number of liters in a cubic decimeter? What are they?
    9·1 answer
  • Which salt is formed by the reaction between hydrochloric acid and sodium hydroxide, write with chemical equation. .​
    6·1 answer
  • The ratio of zinc to copper in some alloy is 2 to 5. If 60 kilograms of zinc are used, how many kilograms of copper are needed t
    11·1 answer
  • Caleb is an inventor who has designed a new kind of fishing net. He is looking for a strong, flexible material that can be used
    10·2 answers
  • Last post as a troll lol, sorry but i need actual help this time.
    15·2 answers
  • What is gadolinium<br><br> And what would be a superpower that relates to it
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!