Our understanding of how rainbows form is based partly in the book of optics written by which scientist

i think 4.44 moles

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este