Maybelline Cousteau's oxygen tank reads 900 mmHg while on her boat, where the temperature is 27C. When
she dives down to the bottom of the Rtic Ocean, the
temperature will drop down to -12C. What will the
pressure in her tank be at that temperature?

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf   

It idk haha what are we doing?

B. nuclear reactions could first occur.

They cool it down and aluminum cools easily