One of the steps in processing some metals is smelting. what does smelting do for a metal?

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

Agas occupies 475 cm^3 at 313k. find its volume at 367k. you must show all of your work to receive credit. be sure to identify which of the gas laws you will be using

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change