The 20 amino acids vary only in their? a. carboxyl groups b. side groups c. amino groups d. lipid groups

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

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both