What volume of 0.25M solution can be made from 2.1 mol of KCl?

What’s the scientific notation for the number 6,840,000,000

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) .

All of the following are part of the biosphere except