Use ideas about electron transfer to explain why green precipitate, iron(ii) hydroxide turns red-brown on standing.

Jessica is traveling from miami, florida, to chicago, illinois. using the map, tell one way the land will change during the second half of her trip.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer