In a first-order reaction, how does the rate change if the concentration of the reactant decreases to one-third its original value?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?

Name the element in group 17, period 2. (periodic table)

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