Write true or false Equal volumes of two different substances have equal masses.

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The statement claims that equal volumes of two different substances have equal masses. We need to analyze whether this is true or false.

2. **Concept of Density**: Density is defined as mass per unit volume. Different substances have different densities. For example, iron has a much higher density than foam.

3. **Equal Volumes**: When we say "equal volumes," we mean that we are comparing the same amount of space occupied by both substances.

4. **Comparing Masses**: If we take equal volumes of iron and foam, the mass of iron will be significantly greater than the mass of foam because the particles in iron are more closely packed together. This means that iron is denser than foam.

5. **Conclusion**: Since equal volumes of different substances can have different masses due to differences in density, the statement is false.

**Final Answer**: The statement "Equal volumes of two different substances have equal masses" is **False**.

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