How many grams are in 4.5 moles of sodium

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.

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate

What type of reaction is this equation c2h5s + o2 > co2 + h2o + so2