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
Sergeeva-Olga [200]
3 years ago
10

What is the velocity of a electron whose wavelength is 100 pm?

Chemistry
1 answer:
Anni [7]3 years ago
5 0

Answer:

v = 7.3 × 10⁶ m/s

Explanation:

Given data:

Velocity of electron = ?

Wavelength = 100 pm

Solution:

Formula:

λ = h/mv

λ = wavelength

h = planck's constant

m = mass

v = velocity

Now we will put the values in formula.

100 ×10⁻¹² m = 6.63 × 10⁻³⁴ j.s / 9.109 × 10⁻³¹ kg ×  v

v = 6.63 × 10⁻³⁴ kg.m²/s /  9.109 × 10⁻³¹ kg ×100 ×10⁻¹² m

v = 6.63 × 10⁻³⁴ m/s /910.9 × 10⁻⁴³

v = 0.0073  × 10⁹ m/s

v = 7.3 × 10⁶ m/s

You might be interested in
Asprin can be made by adding 200.0 g of salicylinc
damaskus [11]
Correct, Was that a question.
7 0
3 years ago
Tempature increases as altitude increses because you're moving closer to the sun is it true
Alex777 [14]
Nope. It is false. Temperature decreases as altitude increases.
5 0
2 years ago
Scientists have evidence that carbon dioxide can trap heat. Scientists know that burning fossil fuels releases carbon dioxide. B
Yuki888 [10]

Answer:

make it warmer

Explanation:

7 0
3 years ago
Read 2 more answers
The melting point of aluminum is about 660 °C. How many degrees above the boiling point of water is this temperature?
Arte-miy333 [17]
560 degrees above water
8 0
2 years ago
It takes 281.7 kJ of energy to remove 1 mole of electrons from the atoms on the surface of lithium metal. If lithium metal is ir
Alex17521 [72]

Answer:

The maximum kinetic energy of electron is = 2.93 × 10^{-19} Joule

Explanation:

We know that total energy

E = \frac{hc}{\lambda}  ------------ (1)

Here h = plank's constant = 6.62 × 10^{-34} J s

c = speed of light = 3 × 10^{8} \frac{m}{s}

\lambda = 261 nm = 261  × 10^{-9} m

Put all these values in equation (1) we get

E = 7.6   × 10^{-19} J

We know that

Total energy = Energy to remove an electron + K.E of electron

Energy to remove an electron = \frac{281.7 (1000)}{(6.023)10^{23} }

Energy to remove an electron = 4.67  × 10^{-19} J

K.E of electron = Total energy - Energy to remove an electron

K.E of electron = 7.6   × 10^{-19} -  4.67  × 10^{-19}

K.E of electron = 2.93 × 10^{-19} Joule

Therefore the maximum kinetic energy of electron is = 2.93 × 10^{-19} Joule

3 0
3 years ago
Other questions:
  • A gas occupies a volume of 30.0L, a temperature of 25°C and a pressure of 0.600atm. What will be the volume of the gas at STP?​
    11·1 answer
  • If the pOH of vinegar is 9.45, what is its [OH− ]?
    8·2 answers
  • If a solution has a pOH of 8.71, what is the [H+]?
    14·1 answer
  • A mileage test is conducted for a new car model. Thirty randomly selected cars are driven for a month and the mileage is measure
    13·1 answer
  • What's evaporation according to kinetic particle theory?​
    7·1 answer
  • Nervous System Freezes the Muscles:controls senses & most body functions .Carries message & information between the brai
    6·1 answer
  • What is the concentration of a solution that is made by diluting 50.0 mL of a 0.40 M NaCl solution to a final volume of 1000.0 m
    10·1 answer
  • You are given the balanced chemical equation below. If you start this chemical reaction with 0.53 moles of CH4 and 1.5 moles of
    5·1 answer
  • 35 Before the discovery of oxygen some scientists had a different theory about burning.
    13·2 answers
  • What job uses % vol units?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!