A firecracker exploding would be an example of a (n) ___? A. Physical change B. Exothermic reaction C. Formation of a precipitate D. Endothermic reaction

Which of the following is not true in regard to noble gases? A. These elements tend to be relatively inactive B. These elements tend to gain or lose electrons easily C. These elements are found in the last column (Group 18) on the periodic table D.

Which term refers to the speed at which reactants are converted into products? A) reaction rate B) activation energy C) meta stable state D) spontaneous reaction

How many molecules of ascorbic acid (vitamin c, c6h8o6) are in a 500 mg tablet?

What is the atomic mass that of magnesium

How many moles in 1 teaspoon of water.

Which of those molecules are polar. Co2, So2, CH2Cl2, PCl3

A chemical spill gets into the soil and effects the plants within a forested ecosystem. explain why the top predators would be most affected by this

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles