When does heat produce a chemical change?

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

It takes 945.kj/mol to break a nitrogen-nitrogen triple bond. calculate the maximum wavelength of light for which a nitrogen-nitrogen triple bond could be broken by absorbing a single photon.

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery