Memo - ecexams.co.za
Memo - ecexams.co.za
Memo - ecexams.co.za
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10 FISIESE WETENSKAPPE V2 (NOVEMBER 2012)<br />
VRAAG 5<br />
4.2.5<br />
Riglyne vir grafiek nasien<br />
X-as korrek benoem <br />
Y-as korrek benoem <br />
Korrekte vorm van grafiek [11.1.2] (4)<br />
[21]<br />
5.1 Nikotien. [11.3.2] (2)<br />
5.2 (Enige Een: )<br />
Ni<strong>co</strong>rette/Ni<strong>co</strong>trol/nikotiengom/tabakgom/koutabak/<br />
nikotienpleister/ni<strong>co</strong>gel/plaaslike tabakpasta/elektroniese<br />
sigarette. [11.3.2] (2)<br />
5.3 Dit veroorsaak longkanker/ keelkanker/ mondkanker, ens.<br />
(Enige ander relevante feit.) [11.3.2] (1)<br />
5.4<br />
m(C) = 74,07 g ∴ n(C) = ,<br />
m(H) = 8,65 g ∴ n(H) = ,<br />
m(N) = 17,28 g ∴ n(N) = ,<br />
∴ molverhouding C:H:N = 5:7:1<br />
∴ Empiriese formule: C5H7N1 <br />
,<br />
= 6,173 ∴<br />
, = 5<br />
,<br />
= 8,65 ∴<br />
, = 7 <br />
,<br />
= 1,234 ∴<br />
, = 1<br />
M (molekulêre formule) = nM (empiriese formule)<br />
162,2 g∙mol -1 = n(81 g∙mol -1 )<br />
∴ n = 2 <br />
∴ molekulêre formule: C10H14N2 [11.1.3] (7)<br />
[12]