Ron and sulfur react to yield iron sulfide. Balance this reaction. ___Fe(s) + ___S8(s) → ___FeS(s)

A) 1, 8, 1
B) 1, 1, 1
C) 8, 1, 8
D) 8, 8, 8

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.