Read the information below on how to calculate density and then answer the questions that follow. %0D%0A%0D%0A%0D%0A%0D%0AQuestion 1%0D%0A %0D%0A%0D%0A %0D%0A%0D%0A %0D%0A%0D%0AA loaf of bread has a volume of 2270 cm^3 and a mass of 454 grams. What is the density of the bread? A calculator has been provided for you below. %0D%0A%0D%0A%0D%0A%0D%0A(1 point)%0D%0A g/cm^3%0D%0ACheck Answer%0D%0AQuestion 2%0D%0AScientists identify an unknown substance on Mars. They collect the substance and record its physical properties. The mass of the substance is 4725 grams and the volume of the substance is 350 cm^3. Use the calculator provided below to calculate the density. Then, use the chart provided in the initial information to identify the substance. %0D%0A%0D%0A%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0ALead%0D%0ALead%0D%0A%0D%0AMercury%0D%0AMercury%0D%0A%0D%0AGold%0D%0AGold%0D%0A%0D%0AIron%0D%0AIron

1 answer

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:

  1. Density of the bread: 0.200 g/cm³
  2. The unknown substance is: Mercury.