How does the value of Ka and Kb compare with the concentrations of hydronium ion and hydroxide ion? ОК, хK, = [Н,0*][ОН
ок, хK, > [Н,0*][ОНГ)
ок, хK, < [Н,0*]+[ОНГ]
[Н,0*]
OK x Kb =
[ОН)

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3