What is the density of a rock with a mass of 20 grams and a volume of 10 mL?

• A. 200 g/mL
• B. 0.5 g/mL
• C. 2 g/mL
• D. 10 g/mL

Answer: (C)

Verified step by step guidance

1. Recall the formula for density, which is defined as mass divided by volume: \(\text{Density} = \frac{\text{Mass}}{\text{Volume}}\).
2. Identify the given values from the problem: mass = 20 grams and volume = 10 mL.
3. Substitute the given values into the density formula: \(\text{Density} = \frac{20\ \text{g}}{10\ \text{mL}}\).
4. Perform the division to find the density value (do not calculate the final number here, just set up the expression).
5. Interpret the units of the result as grams per milliliter (g/mL), which is the standard unit for density in this context.