Calculate the volume of 1.4e25 atoms of n2

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.