Which of the following is an example of a decomposition reaction?
HgO + Cl2-->HgCl + O2
Na + Br2 --> NaBr
KCIO3 --> KCI + O2
AgF + CaCl2 → AgCl + CaF2

What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

It is really hard for me right know