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lesantik [10]
3 years ago
11

A line in the lyman series of hydrogen has a wavelength of 122 nm. from what state did the electron originate?

Chemistry
1 answer:
ra1l [238]3 years ago
4 0
Lyman series is when the electron transitions from n≥2 to n=1. So, for the Lyman series, the Rydberg formula becomes

1/λ = R(1 - 1/n²)
where λ is the wavelength and R is the Rydberg constant for hydrogen (0.010972 nm⁻¹)

1/122 = 0.010972(1 - 1/n²)
Solving for n,
n = 1.988≈2

<em>Thus, the electron originated from the 2nd energy level.</em>
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Assuming total mass to be 100 g

Mass of C = 52.93 g

=> Moles of C = 52.93 g *\frac{1 mol}{12gC} =4.41 mol C

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Simplest mole ratio of the atoms in the compound:

C_{\frac{4.41mol}{2.94mol} } H_{\frac{5.86mol}{2.94mol} }N_{\frac{2.94mol}{2.94mol} } =C_{1.5}H_{2}N_{1} or(C_{1.5}H_{2}N_{1})_{2}=>C_{3}H_{4}N_{2}

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Multiple n = \frac{204.2}{68.04}=3

Molecular formula= (Empirical formula)_{n} =(C_{3}H_{4}N_{2})_{3}=C_{9}H_{12}N_{6}


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