Which equation obeys the law of conservation of mass? h2(g) + o2(g) → h2o(g) h2(g) + o2(g) → h2o(g) +4he(g) 2h2(g) + o2(g) → 2h2o(g) h2(g) → h2o(g) h2(g) + o2(g) → 2h2o(g)

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.

Nthis lab, you will do experiments to identify types of changes. using the question format you learned (shown above), write an investigative question that you can answer by doing these experiments

How many distinct monochlorinated products, including stereoisomers, can result when the alkane below is heated in the presence of cl2? 3 4 5 6 7?