Why do you need lugols reactant for a spectrometer.

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0

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

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?