5. how are the empirical and molecular formulas for a compound related?
a an empirical formula is sometimes a multiple of the molecular
formula.
ba molecular formula is always the same as an empirical formula.
c an empirical formula is always larger than the molecular formula.
d a molecular formula is sometimes a multiple of the empirical formula.

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 !