Question

Calculate these volumes.

(a) what is the volume of 11.3 g graphite, density = 2.25 g/cm3?
(b)What is the volume of 39.657 g bromine, density = 2.928 g/cm3?

Answer 1

For a: The volume of graphite is
`5.02cm^3`

For b: The volume of bromine is
`13.54cm^3`

Step-by-step explanation:

To calculate volume of a substance, we use the equation:

`\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}` ......(1)

• For a:

Density of graphite =
`2.25g/cm^3`

Mass of graphite = 11.3 g

Putting values in equation 1, we get:

`2.25g/cm^3=\frac{11.3g}{\text{Volume of graphite}}\\\\\text{Volume of graphite}=(11.3g)/(2.25g/cm^3)=5.02cm^3`

Hence, the volume of graphite is
`5.02cm^3`

• For b:

Density of bromine =
`2.928g/cm^3`

Mass of bromine = 39.657 g

Putting values in equation 1, we get:

`2.928g/cm^3=\frac{39.657g}{\text{Volume of bromine}}\\\\\text{Volume of bromine}=(39.657g)/(2.928g/cm^3)=13.54cm^3`

Hence, the volume of bromine is
`13.54cm^3`

Answer 2

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