Why is carbon and nitrogen important?

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.