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Arisa [49]
3 years ago
9

What happens to the do Broglle wavelength of an electron If its momentum ls doubled?​

Chemistry
1 answer:
algol133 years ago
8 0
Answer:
The De Broglie wavelength decreases when the momentum increases
Explanation:
The De Broglie wavelength of a particle (or any object) is given by

where
h is the Planck constant
p is the momentum of the object
As we can see, the wavelength is inversely proportional to the momentum of the object: therefore we can say that, if the momentum increases, the De Broglie wavelength will decrease.
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Answer:

= 72900 years

Explanation:

  • The half-life is the time taken by a radioactive material to decay by half the original amount.
  • The half-life of plutonium-239 is 24300 years which means it takes 24300 years to decay by half the original amount.

To calculate the time taken for a mass of 8 kg to decay to 1 kg we use;

New mass = Original mass x (1/2) ^n, where n is the number of half-lives

Therefore;

1 kg = 8 kg × (1/2)^n

1/8 = (1/2)^n

solving for n;

n =3

Therefore;

Time = 3 × 24300 years

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It will, therefore, take 72900 years for 8 kg of plutonium-239 to decay to 1 kg.

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. Find the mass of 0.159 mol silicon dioxide.​
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Answer:

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If the mass you mean by grams:

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Cancel moles with moles (Original moles with the 1 mol at the bottom of the grams) and gives you:

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