Number 8
4 marks · NormalThe table shows data for three substances.
| Substance | Mass (g) | Volume (cm³) | Density (g/cm³) |
|---|---|---|---|
| A | 54 | 60 | |
| B | 40 | 4.2 | |
| C | 72 | 1.8 |
Complete the missing values for density, mass, or volume for each substance.
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.
Show answer
Must show: A: 0.9 g/cm³, B: 168 g, C: 40 cm³
Common mistakes: Incorrect use of formula (wrong rearrangement or operations)
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Uses or rearranges density formula correctly for any missing value.
A1 · 1 mark · Correct density for A: 54 / 60 = 0.9 g/cm³.
A2 · 1 mark · Correct mass for B: 4.2 × 40 = 168 g.
A3 · 1 mark · Correct volume for C: 72 / 1.8 = 40 cm³.
Worked solution
For A: density = mass/volume = 54 / 60 = 0.9 g/cm³.
For B: mass = density × volume = 4.2 × 40 = 168 g.
For C: volume = mass/density = 72 / 1.8 = 40 cm³.