High School

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------------------------------------------------ Calculate the density in grams per cubic centimeter for the following:

a. Mass: 365 g and Volume: [tex]358 \, \text{cm}^3[/tex]
Density: [tex]\square \, \text{g/cm}^3[/tex]

b. Mass: 0.520 lb and Volume: 756 mL
Density: [tex]\square \, \text{g/cm}^3[/tex]

c. Mass: 7.68 kg and Volume: [tex]1080 \, \text{cm}^3[/tex]
Density: [tex]\square \, \text{g/cm}^3[/tex]

d. Mass: 235 mg and Volume: 1.72 mL
Density: [tex]\square \, \text{g/cm}^3[/tex]

Answer :

Sure, let's go through the steps to calculate the density for each part of the problem:

a. Mass = 365 g, Volume = 358 cm³

1. Use the formula for density:
[tex]\[ \text{Density} = \frac{\text{Mass}}{\text{Volume}} \][/tex]

2. Plug the values into the formula:
[tex]\[ \text{Density} = \frac{365 \, \text{g}}{358 \, \text{cm}^3} \][/tex]

3. Calculate the density:
[tex]\[ \text{Density} \approx 1.020 \, \text{g/cm}^3 \][/tex]

b. Mass = 0.520 lb, Volume = 756 mL (or cm³)

1. First, convert mass from pounds to grams.
[tex]\( 1 \, \text{lb} = 453.59237 \, \text{g} \)[/tex]
[tex]\[ \text{Mass in grams} = 0.520 \, \text{lb} \times 453.59237 \, \text{g/lb} \][/tex]

2. Calculate the mass in grams:
[tex]\[ \text{Mass} \approx 235.868 \, \text{g} \][/tex]

3. Use the formula for density:
[tex]\[ \text{Density} = \frac{235.868 \, \text{g}}{756 \, \text{cm}^3} \][/tex]

4. Calculate the density:
[tex]\[ \text{Density} \approx 0.312 \, \text{g/cm}^3 \][/tex]

c. Mass = 7.68 kg, Volume = 1080 cm³

1. Convert mass from kilograms to grams.
[tex]\( 1 \, \text{kg} = 1000 \, \text{g} \)[/tex]
[tex]\[ \text{Mass in grams} = 7.68 \, \text{kg} \times 1000 \, \text{g/kg} \][/tex]

2. Mass in grams is:
[tex]\[ \text{Mass} = 7680 \, \text{g} \][/tex]

3. Use the formula for density:
[tex]\[ \text{Density} = \frac{7680 \, \text{g}}{1080 \, \text{cm}^3} \][/tex]

4. Calculate the density:
[tex]\[ \text{Density} \approx 7.111 \, \text{g/cm}^3 \][/tex]

d. Mass = 235 mg, Volume = 1.72 mL (or cm³)

1. Convert mass from milligrams to grams.
[tex]\( 1 \, \text{mg} = 0.001 \, \text{g} \)[/tex]
[tex]\[ \text{Mass in grams} = 235 \, \text{mg} \times 0.001 \, \text{g/mg} \][/tex]

2. Mass in grams is:
[tex]\[ \text{Mass} = 0.235 \, \text{g} \][/tex]

3. Use the formula for density:
[tex]\[ \text{Density} = \frac{0.235 \, \text{g}}{1.72 \, \text{cm}^3} \][/tex]

4. Calculate the density:
[tex]\[ \text{Density} \approx 0.137 \, \text{g/cm}^3 \][/tex]

And there you have it, the densities for each part are approximately:
- a. [tex]\( 1.020 \, \text{g/cm}^3 \)[/tex]
- b. [tex]\( 0.312 \, \text{g/cm}^3 \)[/tex]
- c. [tex]\( 7.111 \, \text{g/cm}^3 \)[/tex]
- d. [tex]\( 0.137 \, \text{g/cm}^3 \)[/tex]