Why does an exothermic reaction need activation energy?

Why does the mass number equal the total number of protons and neutrons? and what is mass number of atoms expressed in the Periodic table?

Why would an aqueous solution of a strong electrolyte conduct electricity better than an aqueous solution of a weak electrolyte? A. More ions are in solution with a weak electrolyte. B. More ions are in solution with a strong electrolyte. C.

This formula equation is unbalanced. Pb (NO3) 2 (aq) + Li2SO4 (aq) Right arrow. PbSO4 (s) + LiNO3 (aq) Which coefficient should appear in front of LiNO3 in the balanced equation? 1 2 3 4

The degree of order of matter is directly proportional to the cohesive forces that hold the matter together. In other words, the more organized the state of matter, the stronger is the glue that holds it together.

Why do clothes that come out of my dryer smell bad?

What factors allowed the koala population to grow beyond what their habitat could sustain?

What are the subscripts for the molecular formula of C2H3

What does the dashes line represent? A. Medium B. Boundary C. Normal D. Incident Ray

Only a small amount of cerium oxide nanoparticles is needed because the nanoparticles ... 1) are elements 2) are very reactive 3) have a high surface area to volume ration

Describe the solubility of water compared to ethanol?