30.5 mL of a weak base are titrated with 24.3 mL of a strong 1.5 M acid solution. What is the concentration of the weak base before any acid was added?

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

hope this

"the periodic table is arranged in order of atomic number."

the answer is 1 i believe

answer: they produce more slow than unicellular organisms.