How is a pound of lead different from a pound of feathers

Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Which characteristics can be used to differentiate star systems? check all that apply.

Suppose you mix one mole of sulfuric acid (h2so4) with 1 mole of sodium hydroxide(naoh). why does the ph of the solution remain below 7? ( explain so i can get better understanding! )