5. A student recorded the values 6.50, 6.54, 6.58, and 6.62 mL successively for a titration. In order to calculate a mean titre value;
5-8:
(a) Is it necessary for her to perform a fifth titration? Justify your answer.
(b) Which of these values, if any, should she use in calculating the average titre value, and
why?

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

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph