If the base-dissociation constant, kb, for a substance is 4.3 x 10^–10, what does this tell you about ka?
a) ka = 2.3 x 10^–5
b) ka = 1.0 x 10^–4
c) ka = 2.3 x 10^2
d) ka = 1.0 x 10^3

In the experiment you asked to react hydrochloric acid and with sodium hydroxide. when measuring the volume of the reactants, which instrument would give the greatest precision.

Which of these describes how heat is transferred by convection* a. sunlight travels through space without the aid of fluids or solids. b. warm air rises and takes the heat with it, eventually, it cools and sinks c. air at the equator rises and sinks at the poles. d. air molecules touch the warm ground, heating them up *not conduction

The decimals you found in part b are called repeating decimals. in the gizmo, repeating decimals are rounded to two places. how does the gizmo show you that a decimal has been rounded?