Question

What is the identity of a sample that has a mass of 100.5 g and a volume of 7.42 cm3?

1. lead
2. iron
3. gold
4. mercury

Answer 1

the answer will be mercury

Answer 2

Answer: The correct answer is Option 4.

Step-by-step explanation:

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

`\text{Density of a substance}=\frac{\text{Mass of a substance}}{\text{Volume of a substance}}`

We are given:

Mass of sample = 100.5 g

Volume of sample =
`7.42cm^3`

Putting values in above equation, we get:

`\text{Density of sample}=(100.5g)/(7.42cm^3)\\\\\text{Density of sample}=13.6g/cm^3`

The known density of the given metals are:

Density of lead =
`11.34g/cm^3`

Density of iron =
`7.87g/cm^3`

Density of gold =
`19.32g/cm^3`

Density of mercury =
`13.6g/cm^3`

The calculated density matches the given density of mercury.

Hence, the correct answer is Option 4.