Determina la cantidad, en masa, de Cu(NO3)2 que podemos obtener, al tratar 25 g de Cu con un exceso de HNO3, si en la reacción obtenemos también NO2 más agua. ( masa atómicas: Cu:63,5 g/mol; N:14 g/mol; O:16 g/mol) Cu + 4 HNO3 ↔ Cu(NO3)2 + 2 NO2 + H2O

Where are chemicals found at work? a. only in cleaning products b. only in carpets and paint c. in every area of work d. only in food preparation submit

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.

Which of two curves exhibits exponential growth