How much water do you need to add 10ml of a solution hcl with ph 3 to change the ph to 6

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.

Tell me the iupac name of the following compounds:

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?