To what volume should 25mL of 15M nitric acid be diluted to prepare a 3.0M solution?

125 mL will be the volume to be diluted

Explanation:

Dilution formula to be applied in this case:

Concentrated M . Concentrated volume = Diluted volume . Diluted M

Let's replace data:

Concentrated M = 15 M

Concentrated volume: 25 mL

Diluted volume = ?

Diluted M = 3M

Lets replace: 15 M . 25 mL = Diluted volume . 3M

Diluted volume = (15 M . 25 mL) / 3 M →  125 mL

whats the meaning of /

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.