What would happen if the pilot was unable to cool down the heated air trapped inside the balloon?

Iknow #2 is d. i just need to know why

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]

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?