Question

data table: initial volume calculated: including weight 30ml of water without a solid= 18.59g final volume calculated: including weight 50ml of water with a solid = 123.21g calculated volume: 50ml - 30ml=20ml calculated density:

Explanation:

Step1: Find the mass of the solid

The mass of the water - solid combination is 123.21g and the mass of the water alone is 18.59g. So the mass of the solid $m$ is found by subtracting the mass of water from the mass of water - solid combination.
$m = 123.21 - 18.59=104.62g$

Step2: Recall the formula for density

The formula for density $
ho$ is $
ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume. We know from the table that the volume of the solid $V = 20ml$ (since the volume change of water is due to the solid being added).

Step3: Calculate the density

Substitute $m = 104.62g$ and $V = 20ml$ into the density formula.
$
ho=\frac{104.62}{20}=5.231g/ml$

Answer:

$5.231g/ml$