A photon has a frequency of 2.9 ~ 10-16 Hz. Planck's constant is 6.63 x 10-34 Jos. The energy of the photon, to the nearest tenths place, is
10-49 J.

Sorry i dont understand the question can you rephase it?

A1 a 2 a 3 ooh lol i think that's it

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.

C, small, hard spheres with insignificant volumes