Edexcel IGCSE Physics 5.3 Density Equation Questions

Apply density data to identify materials, account for container mass and solve problems involving solids and liquids.

Exam points

State and rearrange ρ = m/V to calculate density, mass or volume; give a consistent unit and round to the requested precision.
Identify a material by comparing its calculated density with reference values, or use density results to decide whether samples are made from different materials.
Find the mass of a liquid by subtracting the empty container mass, then use density = mass ÷ volume to calculate the liquid’s density or volume.

[Maximum number: 4]

This question is about liquid nitrogen.

(a)

A teacher uses this method to find the density of liquid nitrogen.
- measure the mass of a container
- pour liquid nitrogen into the container
- measure the total mass of the container and the liquid nitrogen
- read the volume of the liquid nitrogen from the scale on the side of the container

[ 4 ]

(i)

State the formula linking density, mass and volume.

[ 1 ]

(ii)

Calculate the density of the liquid nitrogen.

Give a suitable unit.

[ 3 ]

Marking points:
- substitution
- evaluation
- matching unit

Example:
$\rho=\frac{m}{V}$ $\rho=\frac{74}{88}$ $\rho=0.84\ \mathrm{g\,cm^{-3}}$

Accept:
- $0.8409090\ldots\ \mathrm{g\,cm^{-3}}$
- ECF from incorrect mass

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Edexcel IGCSE Physics 5.3 Density Equation Questions question 1

Question (a)

Question (i)

Question (ii)