What weight of each of the following is needed to make 1 L aqueous solution of (a) 0.2M; (b) 0.5N

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?