To calculate density, you can use the formula:
\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \]
Question 1
For the loaf of bread:
- Mass = 454 grams
- Volume = 2270 cm³
Using the formula:
\[ \text{Density} = \frac{454 \text{ g}}{2270 \text{ cm}^3} \]
Calculating it:
\[ \text{Density} \approx 0.200 \text{ g/cm}^3 \]
Question 2
For the unknown substance on Mars:
- Mass = 4725 grams
- Volume = 350 cm³
Using the formula again:
\[ \text{Density} = \frac{4725 \text{ g}}{350 \text{ cm}^3} \]
Calculating it:
\[ \text{Density} \approx 13.5 \text{ g/cm}^3 \]
Now, using the chart provided in the initial information (which is not shown here, but generally available densities for various substances are):
- Lead has a density of about 11.3 g/cm³
- Mercury has a density of about 13.6 g/cm³
- Gold has a density of about 19.3 g/cm³
- Iron has a density of about 7.9 g/cm³
Since the calculated density (13.5 g/cm³) is very close to that of mercury (13.6 g/cm³), the unknown substance is likely Mercury.
Final Answers:
- Density of the bread: 0.200 g/cm³
- The unknown substance is: Mercury.