To find the density \( d \), we can use the formula for density:

\[
d = \frac{m}{v}
\]

where:
- \( m \) is the mass (84 g),
- \( v \) is the volume (65 mL).

Substitute the values:

\[
d = \frac{84 \, \text{g}}{65 \, \text{mL}} = 1.292 \, \text{g/mL}
\]

So, the density \( d \) is approximately \( 1.29 \, \text{g/mL} \).

Would you like any further details or have any questions?

Here are 5 related questions:
1. How does temperature affect the density of a substance?
2. What is the formula for mass if density and volume are known?
3. How would you calculate the volume of an object if the density and mass are given?
4. Why is density important in identifying substances?
5. Can two different substances have the same density?

**Tip**: Always ensure the units for mass and volume are compatible when calculating density.

Learn how to calculate density using the formula d = m/v with a mass of 84g and a volume of 65mL. This step-by-step guide is suitable for students in Grades 6-8 and covers key concepts in density and unit conversions.

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