Enzymes accelerate reaction rates by 10 7 to 10 17 compared to the uncatalyzed reactions. The ratio of the rate of the catalyzed reaction to the rate of the uncatalyzed reaction ( rate cat / rate uncat ) is known as the rate enhancement. The rate enhancement can be related to the difference in the free energies of activation. Note: The difference in the free energies of activation, or Δ G ∘ ‡ uncat – Δ G ∘ ‡ cat , can be expressed more succinctly as Δ Δ G ∘ ‡ . Δ Δ G ∘ ‡ = R T ln ( rate cat rate uncat ) From the given rates, calculate the rate enhancement and the Δ Δ G ∘ ‡ in kilojoules per mole at T = 25 ∘ C . Enter each answer as a whole number. Uncatalyzed rate = 10 − 6 s − 1 Catalyzed rate = 10 2 s − 1 R = 8.3145 J / ( K ⋅ mol )

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.  

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.