Moles of O2 formed = Moles of Magnesium nitrate / 2 = __________
RFM of O2 = 2 x 16 = _______
Mass of O2 = moles x RFM = 0.225 x 32 = ________g
Other Answer Choices:
7.2
32
0.225
Question 18
18.
Other Answer Choices:
2
0.9
Question 19
19.
Question 20
20.
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
Crude oil and hydrocarbons
A
B
C
D
Alkanes (note we study B (carboxylic acid) and C (alcohol) in Year 11)
A
B
C
D
Homologous series
A
B
C
D
Polymers
A
B
C
D
Rate of reaction
A
B
C
D
Fuels and hydrocarbons.
(Note 1. we do not study triple bonds in GCSE chemistry).
A
B
C
D
Cracking or addition polymerisation
A
B
C
D
A
B
C
D
RAM
A
B
C
D
Reaction profiles
A
B
C
D
Reacting masses
A
B
C
D
Types of model
A
B
C
D
Fractional distillation
A
B
C
D
Mole calculation (this is a slightly ambiguous question but assume that moles of N2 are meant.
A
B
C
D
Allotropes of carbon
A
B
C
D
Empirical and molecular formulae
A
B
C
D
Moles of NO2 = ______ x moles of magnesium nitrate = ________
molecules of NO2 = moles x the avogadro constant = _________________
4.3344 x10 24
4.33 x 10 24
Rate of reaction.
Note that this graph is a bit artificial (we would expect a curve rather than a straight line at the start of the reaction so a tangent would have to be drawn)