0.3 mole of aluminium (Atomic mass of Al=27).

Calculate the number of unit cells in 8.1 g of aluminium, if it crystallises in a face centered cubic structure. ( Atomic mass of Al = 27 g mol^(-1) )

The reaction between aluminium and ferric oxide can generate temperatures up to 3273 K and is used in welding metals. (Atomic mass of Al = 27 u Atomic mass of 0 = 16 u) 2Al + Fe_(2)O_(3) to Al_(2)O_(3)+ 2Fe , If, in this process, 324 g of aluminium is allowed to react with 1.12 kg of ferric oxide. (i) Calculate the mass of Al_(2)O_(3) formed. (ii) How much of the excess reagent is left at the end of the reaction?

How many moles of barium suphate is precipitated when 1 mole of aluminium sulphate reacts completely with barium chloride ?