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Alex Ar [27]
3 years ago
10

Sometimes light behaves like a wave, and sometimes it behaves like a particle. True False

Chemistry
1 answer:
Tamiku [17]3 years ago
4 0
Your answer is most likely:
True
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Magnesium metal a gray solid, is heated in a crucble in the presence of oxygen
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The energy required to ionize a mole of potassium ions is 419 kJ/mol . What is the longest wavelength of light capable of this i
liraira [26]
<span>First divide the ionization energy by Avogadro's number to get the energy per atom of potassium;
</span>419 kj/mol / 6.023 x 10²³
= 4.19 x 10⁵ / 6.023 x 10²³ = 6.96 x 10⁻¹⁹
E = hc/λ
where lambda (λ<span>) is the wavelength, h is Planck's constant, c is the speed of light 
</span>E = 6.96 x 10⁻¹⁹ j/atom<span>
h =</span>6.63x10⁻³⁴<span> Js
c = 3 x 10</span>⁸ m/s
λ = ?
λ = hc/E = (6.63x10⁻³⁴ x 3 x 10⁸ ) / 6.96 x 10⁻¹⁹ = 285.8nm = 286nm
<span>The longest wavelength of light capable of this ionization is 286nm.</span>
3 0
3 years ago
What measurements must you make to find the density of a sample of matter
Xelga [282]
You would have to look for the mass of the sample and the volume of the sample.
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3 years ago
Compared to the cells in a healthy body, Elisa's cells are getting far fewer molecules.
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8 0
2 years ago
Determine the amount of moles in 6.36x10^25 molecules of H2O
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