For a particular formic acid buffer (pKa of HCOOH is 3.74), the ratio of CHOO- to CHOOHr at pH 4.25 was 3.236. If you have 100 mL of the buffer and the total ion concentration (CHOOH and CHOO-) is 0.20 M, how many moles of NaCHOO do you need to add to raise the pH to 4.71?

the volume increases

12 is it do you think so

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.