Gold has density 19.3 g/cm³. Find the mass of a gold bar with volume 25cm³.
Step 1 Rearrange for Mass
Mass = Density × Volume
Step 2 Calculate
M = 19.3 × 25 = 482.5g
This study notes covers Worked Example 2: Finding Mass within Density for GCSE Mathematics. Revise Density in Ratio & Proportion for GCSE Mathematics with 14 exam-style questions and 3 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 5 of 6 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Density
Which formula correctly shows how density (D), mass (M) and volume (V) are related?
Explain what is meant by a density of 5 g/cm³.
Quick recall flashcards
Floating Rule
Objects float if their density is LESS than the liquid. Water = 1 g/cm³, so anything under 1 g/cm³ floats.
Density Formula
Density = Mass ÷ Volume. Units: g/cm³ or kg/m³. Cover what you need in the triangle!