Convert this number to its standard form 4.05x10

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

If you want to create an electrical current, which situation would produce a solution capable of this

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0