Where do Alkanes come from

In addition to resembling one another, what other criteria are required for organisms to be grouped in the same species? A. They migrate only with one another. B. They fight only with one another. C. They share food only with one another. D.

Write a sentence that uses the words "mass extinction" correctly

The poisonous solvent contained in elixir sulfanilamide was

Explain the age of fossils based on their layering and the amount of radioactive elements and energy they give off. definitions: evolution,

Which is true according to the kinetic theory? A. the particles that make up solids do not move. B. all particles of matter are in constant motion. C. all particles of matter move very quickly D the particles that make up gases are densely packed

What are the three requirements for an effective collision

What is the force applied when using a simple machine.

Select all that apply. when the products of a reaction have more energy than the reactants: the reaction is exothermic. the reaction is endothermic. the reactants gave up energy. the δh is positive.

How can you determine the number of valence electrons in an atom of a representative element?

Find the cube root of 2.7*10^10