If the concentration of nucleophile increases does the reaction go faster

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

What’s the scientific notation for the number 6,840,000,000

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution