Question

You add 4.7 gg iron to 27.10 mL of water and observe that the volume of iron and water together is 27.70 mLmL . Calculate the density of iron.

Answer 1

Answer : The density of iron is, 7.8 g/mL

Explanation : Given,

Mass of iron = 4.7 g

Volume of water = 27.10 mL

Volume of water and iron = 27.70 mL

First we have to calculate the volume of iron.

Volume of iron = Volume of water and iron - Volume of water

Volume of iron = 27.70 mL - 27.10 mL

Volume of iron = 0.6 mL

Now we have to calculate the density of iron.

$\text{Density of iron}=\frac{\text{Mass of iron}}{\text{Volume of iron}}$

Now put all the given values in this expression, we get:

$\text{Density of iron}=\frac{4.7g}{0.6mL}$

$\text{Density of iron}=7.8g/mL$

Thus, the density of iron is, 7.8 g/mL