What is the correct order of steps to determine the mass of product created, given a certain mass of reactant?

I. Convert given mass to moles
II. Determine mole ratio between given mass and substance being solved for
III. Balance the equation
IV. Convert moles of substance being solved for to mass

Which of the following characteristics are true of enzymes? check all that apply. a.)the structure of an enzyme can change if conditions change. b.)a single enzyme can normally catalyze a wide variety of reactions under many conditions. c.)enzymes are found only in nonliving systems. d.)enzymes allow living things to regulate body conditions through feedback mechanisms. e.)enzymes bind to specific substrates in specific ways. f.)enzymes increase the rate of reaction. g.)when shown in energy-reaction diagrams, enzymes represent the higher activation energy.