Which is a proper description of chemical equilibrium?
(a)the frequencies of reactant and of product collisions are identical.
(b)the concentrations of products and reactants are identical.
(c)the velocities of product and reactant molecules are identical.
(d)reactant molecules are forming products as fast as product molecules are reacting to form reactants.
(e)the numbers of moles of reactants and products are equal.

Use the image below to answer the following questions there are three types of heat transfer occurring in the picture below. write a sentence about where each is occurring. (total three complete sentences in your own words.) on a very cold day, if you place your hand towards the bottom of a window, you can feel the convection of cold air as the cold, dense air sinks. try it out. did you feel the convection? it's a marshmallow on a metal stick over fire

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?