When magnesium combines with sulfur to form magnesium sulfide it is oxidized to mg2+ which statement is true about this reaction

Stage in which a star’s outer layers have started to cool and grow outward?

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

In which reaction is precipitation occurring?