A solution is prepared by dissolving 0.23 mol of lactic acid and 0.27 mol of sodium lactate in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly. The pH does not decrease drastically because the HCl reacts with the present in the buffer solution. The Ka of lactic acid is 1.36 × 10-3.

A lactate ion
B H2O
C lactic acid
D H3O+
E This is a buffer solution: the pH does not change upon addition of acid or base.

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )

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.

how important do you think an instrument is to the musician who plays it?