Which of the following equations is correctly balanced? A. N2 + 3H2 ---> 2NH3

B. H2 + O2 ---> 2H2O

C. 2Ag + 2O ---> Ag2 + O2

D. N2+H2 ---> NH3

Which position represents spring in the southern hemisphere? a) b) c) d)

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Describe what happens to the molecules as water goes from ice to liquid to vapor. be sure to explain what happens to the temperature during the phase changes.