Which of the following is NOT a sign of a chemical reaction?" A. color changes
B. gas bubbles form
C. water freezes
D. light is produced

In an exothermic reaction the bonding energy of the product is: less than the reactants same as the reactants greater than the reactants dependent upon the presence of a catalyst

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

What is the chemical formula for the compound formed between sodium and flour one