Why is Chemistry so hard? And why is it required when most of us aren't going to use it after high school?

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

Which type of precipitation would most likely form when the surface air temperature is slightly below freezing and the air temperature increases as you move upward away from the ground?

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?