Why do scientists use physical properties when talking about substances? a) scientists do not talk about physical properties of substance. b) physical properties find out how much a substance cost. c) physical properties describe substances. d) physical properties of substances are not useful to scientists.

10-14. (a) when 100.0 ml of weak acid ha were titrated with 0.093 81 m naoh, 27.63 ml were required to reach the equivalence point. find the molarity of ha. (b) what is the formal concentration of a- at the equivalence point? (c) the ph at the equivalence point was 10.99. find pk. for ha. (d) what was the ph when only 19.47 ml of naoh had been added?

Which uses electromagnetic radiation to discover the properties and composition of bodies in space? space probe space station space shuttle space observatory

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.