Earth has a surface area of 196 million square miles. What is its area in each unit? (a.)square kilometer (b.)square megameter (c.)square decimeter

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

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.

What is the mass of oxygen gas is consumed in a reaction that produces 4.60mol so2