5 – (PUC-PR) Uma célula galvânica é constituída de 2 eletrodos: 1º eletrodo: 1 lâmina de ferro metálico submersa numa solução de FeSO4 1M. 2º eletrodo: 1 lâmina de prata metálica submersa numa solução de AgNO3 1M. Sabendo-se que os potenciais normais de redução desses dois elementos são: Fe+2 + 2e-→ Fe E0 = - 0,44 V Ag+ + 1e- → Ag E0 = + 0,80 V88 O potencial dessa célula, quando os dois eletrodos são ligados entre si internamente por uma ponte salina e externamente por um fio de platina, será: a) + 0,36 V. b) - 0,36 V. c) - 1,24 V. d) - 1,36 V. e) + 1,24 V.

h let me think

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

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