Why group 18 elements on the periodic table rarely form compounds

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Why is retrograde motion an apparent motion

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm