It is required to collect 95 mol\% of methanol as a condensate from a process stream containing an equimolar ratio of methanol and toluene. Toluene is collected as a bottoms product. Crude oil is required to be heated to \( 1400^{\circ} \mathrm{C} \) before it is sent to a catalytic reactor to crack the carbon chain bonds of the crude to produce petrochemicals. [1] A volume of air needs to be compressed to 5 bars from atmospheric pressure so that it can be delivered to a chemical process. A unit for the reaction of copper and nitric acid to produce copper nitrate. [1] Dusty air from a factory needs to be cleaned before it is exhausted to the atmosphere by using a cylinderical vessel, where dust particles fall down and are collected in a hopper and clean air escapes at the top of the vessel. Large particles of limestone from a nearby quary needs to have its size reduce to fine powder to produce cement.

Please select the molecule(s) with double bond(s) from the following. \( \mathrm{CCl}^{2} \) CHCl 3 CO 3 H 2 O None

Please select the molecule(s) with resonance structures from the following. CCl 4 CHCl 3 SO 3 H 2 O None

Based on your worksheet results, please match the following: The electron group geometry of NH 3 is The electron group geometry of BF 3 is [Choose ] The electron group geometry of \( \mathrm{PF5} \) is [Choose ] [Choose ] electron group geometry of SF4 is geometry of PF 3 is [Choose ]

Please select the molecule(s) that 1) its molecular shape is different from its electron group shape, and/or 2) the central bonds are not identical. NH3 BF3 PFF PF3

L'uraninite, ou pechblende, est un minéral de formule chimique \( \mathrm{UO}_{2} \). Les gisements d'uraninite sont datés uniquement entre 3,5 et 2,2 milliards d'années. Its sont utilisés notamment pour extraire l'uranium uti- lisé dans l'industrie nucléaire civile et militaire. Ces gisements se forment dans des milieux réducteurs, c'est-à-dire en absence de dioxygène. Question Expliquer en quoi l'uraninite est un indice de l'évolution de la teneur en dioxygène terrestre.