The oxidation of propan-2-ol by dichromate ions produces propanone, according to the reaction: 3C3H-OH + Cr2O72- + 8H* → 3C3H70 + 2Cr3+ + 7H20
(2 marks) What volume of 0.1M of potassium dichromate is needed to completely oxidize 1g of propan-
2-ol?
(Note: K2Cr2O → 2K+ + Cr2022, Kis a spectator ion)

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.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.