What can you do to pure, solid iron to chemically change it?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. p k a1 p k a2 1.30 6.70 calculate the ph for each of the points in the titration of 50.0 ml of 1.5 m h3po3(aq) 1.5 m h 3 po 3 ( aq ) with 1.5 m koh(aq). 1.5 m koh ( aq ) .

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.