The external cover of aeroplane is made up of aluminium instead of iron. why?

What is the molar mass of the anhydrous compound? answer using four significant figures. 36.02 g/mol 120.15 g/mol 156.12 g/mol

What two factors can affect the properties of a hydrocarbon? a. the number of its carbon atoms and the number of single bonds b. the number of its carbon atoms and the arrangement of its atoms c. the arrangement of its atoms and the number of its double bonds

The graph shows one consequence of urban sprawl. how did urban sprawl contribute to the change in biodiversity