Answer: The frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm is
.
Explanation:
Given: Wavelength = 546 nm
= 
The relation between frequency and wavelength is as follows.

where,
= frequency
c = speed of light = 
= wavelength
Substitute the values into above formula as follows.

Thus, we can conclude that the frequency of the green light emitted by a hydrogen atom with a wavelength of 546 nm is
.
This might help you hope so
The chemical reaction will be NaF
Hello!
Data:
P (pressure) = 1 atm
V (volume) = 18.5 L
T (temperature) = 300 K
n (number of mols) = ? (in mol)
R (Gas constant) = 0.082 (atm*L/mol*K)
Apply the data to the Clapeyron equation (ideal gas equation), see:






Note:
If the feedback is to be considered, the closest r
esponse is 0.751 mol Nacl
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I hope this helps. =)
The answer is A, Lithium and Sodium.