Solids, Liquids and Gases
5 marks · NormalA metal block is being used in a laboratory investigation.
Describe how you would use apparatus to determine the density of the metal block, including the measurements needed.
The block has a mass of 480 g and its volume is found to be 60 cm³. Calculate its density in kg/m³.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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(a) — · must show measure mass using balance, find volume (ruler or displacement), use density formula
(b) 8000 kg/m³ · must show mass in kg, volume in m³, substitution into density formula
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Mentions measuring mass with a balance.
B2 (a) · 1 mark · Describes finding volume (length × width × height or displacement).
B3 (a) · 1 mark · States use of density formula density = mass/volume.
M1 (b) · 1 mark · Converts mass and volume to SI units.
A1 (b) · 1 mark · Calculates and gives correct density in kg/m³ (accept values 7900–8100).
Worked solution
a) Find the mass of the block using an electronic balance.
Find the volume by measuring its dimensions with a ruler (if regular) or by water displacement (if irregular).
Calculate density with: density = mass/volume.
b) Mass = 480 g = 0.48 kg; Volume = 60 cm³ = 0.00006 m³.