Identify the examples of diffusion in the list below

Aluminum–lithium (al-li) alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. a commercial aircraft skin material having a density of 2.47 g/cm3 is desired. compute the concentration of li (in wt%) that is required.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Can someone me with 6 to 10 plz this is for masteries test.