Which of the following pairs is an example of the diagonal rule? h, he fe, rh i, po li, mg

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

Is this a scientific model? use complete sentences to explain why or why not. a graphic organizer showing the water cycle i need : ( asap i go it never mind

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood