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Ratio & ProportionStudy Notes

Worked Example 2: Finding Mass

Part of Density — GCSE Mathematics

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 5 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 5 of 5

Practice

14 questions

Recall

3 flashcards

Worked Example 2: Finding Mass

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

Keep building this topic

Read this section alongside the surrounding pages in Density. That gives you the full topic sequence instead of a single isolated revision point.

Worked Example 1: Finding DensityWhat Is Density?Key Facts

Practice Questions for Density

Which formula correctly shows how density (D), mass (M) and volume (V) are related?

  • A. D = M + V
  • B. D = M × V
  • C. D = M ÷ V
  • D. D = V ÷ M
1 markfoundation

Explain what is meant by a density of 5 g/cm³.

2 marksstandard

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!

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Worked Example 1: Finding Density

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Density