1) Describe the toughening mechanisms found in the nano-size block copolymer rubber-toughened epoxy. Why this this toughened epoxy system is attractive as a commercial product for many structural applications

Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

An observation that requires measurement is called quantitative observable or qualitative