Acatalyzed reaction will have a activation energy, and this leads to a in the reaction rate.

a) lower, decrease
b) lower, increase
c) higher, decrease
d) higher, increase

The volume of a sphere is given by v= (4/3) pi r cubed, where r is the radius. compute the volume of a sphere with a radius of 117pm. state your answer in units of cubed.

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j