How many calories are needed to increase the temperature of 25 g of water from 30° C to 65° C

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

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.