Sb2S3(s) + 3 Fe(s) -> 2 Sb(s) + 3 FeS(s) How many moles of Sb2S3 are needed to react with an excess amount of iron to produce 9.40 moles of antimony? 

Identify the balanced chemical equation that represents a decomposition reaction. p4 + 3o2 ⟶ p2o3 2fe(oh)3 ⟶ 2feo3 + h2o cuso4 ⟶ cuo + 2so3 2fe(oh)3 ⟶ fe2o3 + 3h2o

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

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.