AL2(SO4)2.XH2O has 8.1% aluminium by mass. The value of X ?

How air particles exert a pressure on the inside of the balloon

Why is permeable soil best for plants that need a lot of drainage?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.