AQA
A-LEVEL
CHEMISTRY
1.2 Amount of Substance
RAM & RMM 3
Time allowed
34 minutes
QUESTION PAPER
Score Percentage
/41 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, Q3. (a) State the relative charge and relative mass of a proton, of a neutron and of an
electron.
In terms of particles, explain the relationship between two isotopes of the same
element.
Explain why these isotopes have identical chemical properties.
(7)
(b) Define the term relative atomic mass. An element exists as a mixture of three
isotopes.
Explain, in detail, how the relative atomic mass of this element can be calculated
from data obtained from the mass spectrum of the element.
(7)
(Total 14 marks)
The relative molecular mass (Mr ) of benzene-1,4-dicarboxylic acid is
A 164
B 166
C 168
C 170
(Total 1 mark)
A-LEVEL
CHEMISTRY
1.2 Amount of Substance
RAM & RMM 3
Time allowed
34 minutes
QUESTION PAPER
Score Percentage
/41 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, Q3. (a) State the relative charge and relative mass of a proton, of a neutron and of an
electron.
In terms of particles, explain the relationship between two isotopes of the same
element.
Explain why these isotopes have identical chemical properties.
(7)
(b) Define the term relative atomic mass. An element exists as a mixture of three
isotopes.
Explain, in detail, how the relative atomic mass of this element can be calculated
from data obtained from the mass spectrum of the element.
(7)
(Total 14 marks)
The relative molecular mass (Mr ) of benzene-1,4-dicarboxylic acid is
A 164
B 166
C 168
C 170
(Total 1 mark)
