Page 216 - Chemistry

35. a) 2SO 2(g) + O 2(g) 2SO 3(g), SO 2 : O 2
2 1 2 60 : 30 ½
60 l 40 l Oxygen ½ by 10 litres

36. Mass of Oxygen = 12 – 8.4 = 3.5g

Element Fe O
Mass 8.4 3.6
R.A.M 56 16
No. of moles 8.4 3.6  ½
56 16
0.15 0.225  ½
Mole ration 0.15 0.225  ½
0.15 0.15
1 1.5 x2
2 3  ½

The empirical formula is Fe 2O 3

Organic chemistry 1
1. a) Bromine decolorized immediately in ethane gas √1
b) Temperature between150°C - 250°C or temperature of 180°C
c) Carbon (IV) oxide or CO 2(g) √

2. (a) Butane
(b) Manufactures of cooking fats and margarine

3. (a) H H H H

H C C C C H

H H
(b) CH 3
H 3C CH 3
C
CH 3
 1

4. a) Existence of cpds with the same molecular formula but different structural
formula/arrangement of atoms

b)

H H H H H H H H H

C = C – C – C – H C - C – C = C – H C = C – C – H
H H
H H H H H – C - H

n – butane/ ½ 2 – butane/½ H
l – butane/ But-2-ene 2 - methyl

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