Write bond-line structural formulas for (a) two constitutionally isomeric primary alkyl bromides with the formula C4H9Br, (b) a secondary alkyl bromide, and (c) a tertiary alkyl bromide with the same formula. Build hand-held molecular models for each structure and examine the differences in their connectivity

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !