A22.4-l sample of which of the following substance, at stp, would contain 6.02 x 10^23 representative particles?
a. gold
b. sodium chloride
c. sulfur
d. carbon dioxide

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

Which type of fossil does this image depict?

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.