Which statement concerning elements is true

What role does the activation energy play in chemical reactions?

Which of these is NOT a colloid? a. Blood b. Fog c. Mountain Dew Soda d. Milk

Which formula equation represents the burning of sulfur to produce sulfur dioxide?

Can someone tell the outcomes of these Steel Wool + Oxygen (Fire) Egg + Heat Water + Heat Zinc + Hydrogen Chloride Sodium Hydroxide + Copper Sulfate

What did Rutherford discover that Thomson did not understand? A. That atoms were too small to affect alpha particles B. That electrons were much smaller than alpha particles C. That an atom's electrons took up as much space as its nucleus D.

Which statement is true for the given reaction? Zn + PbSO4

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2