The current scientific verdict on the phlogiston theory demonstrates which two of the following principles

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

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! )