What are the variables for this piston? temperature only temperature and volume pressure and number of molecules volume and number of molecules

12. complete each of the following word equations for synthesis reactions. a. sodium + oxygen -> b. magnesium + fluorine -> 13. complete and balance the equations for the decomposition reactions. a. hgo -> [with the triangle heat symbol above the arrow] b. h2o(l) -> [with "electricity" written above the arrow]

If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.