Amixture of very finely ground iron particles and sand particles could best be separated in lab by: a magnet adding water and filtering the metals comparing their boiling points comparing their melting points

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

What is the average rate of the reaction between 10 and 20 s?