The Rydberg constant is 3.3 x 1015 Hz. This value is also Group of answer choices

the ionization frequency of iron.

the average frequency of electromagnetic radiation.

the frequency of light emitted by our sun.

the ionization frequency of hydrogen.

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

#2- the hno3 has a h+ ion and the naoh has an oh- ion

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The surface of the water droplet is held together by the attraction between molecules. in order for water to flow more easily into these small spaces, you need to decrease its surface tension. you can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid).