For the electronic transition from n = 2 to n = 4 in the hydrogen atom, calculate the energy.

Which is true of the reactants in this displacement reaction? fe + 2hcl fecl2 + h2 a. the reactants are located to the left of the arrow in the chemical equation. b. the reactants contain 1 iron atom, 2 hydrogen atoms, and 1 chlorine atom. c. the reactants are the atoms, molecules, or compounds formed in the reaction. d. the reactants have the same physical and chemical properties as the products.

Ineed with a, b, c, d, and e on the long answer

Calculate the number of moles of ethane in 100 grams