In a solution prepared by dissolving 0.100 mole of propanoic acid in enough water to make 1.00 L of solution, the pH is observed to be 2.924. The Ka for propanoic acid (HC3H5O2) is: g

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

The data below were determined for the reaction shown below. s2o82– + 3i – (aq) → 2so42– + i3– expt. # [s2o82–] (m) [i –] (m) initial rate 1 0.038 0.060 1.4 × 10 – 5 m/s 2 0.076 0.060 2.8 × 10 – 5 m/s 3 0.076 0.030 1.4 × 10 – 5 m/s the rate law for this reaction must be:

Is it safe to take 450mg of diphenhydramine hydrochloride?