James found that 10.0 mL of a 0.50 M NaOH solution were required to completely titrate 20.0 mL of an unknown concentration H2SO4 solution. What is the concentration of the H2SO4 solution?
A) 0.125 M
B) 0.250 M
C) 0.500 M
D) 0.750 M

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

a electronegativity decreases beacuse the size of nucleus is bigger.

the answer is d.) potassium