Ajutor va rog mult dau coroana

Which of the following is not a true statement about dwarf planets? a the kuiper belt contains comets, asteroids, and dwarf planets. b ceres is a dwarf planet located in the kuiper belt. c the largest known dwarf planet in the solar system is named eris.

Calculate the number of molecules present in 0.750 mol of mgo.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.