3. you measure a block and find the length is 11.2 cm, the width is 4.3 cm, and the height is 1.6 cm. the…

Explanation:

Step1: Calculate the volume of the block

The volume $V$ of a rectangular - block is given by $V = l\times w\times h$, where $l = 11.2$ cm, $w = 4.3$ cm and $h = 1.6$ cm. $V=11.2\times4.3\times1.6$ $V = 11.2\times6.88=77.056$ $cm^{3}$

Step2: Calculate the density

The density $\rho$ is given by the formula $\rho=\frac{m}{V}$, where $m = 125.3$ g and $V = 77.056$ $cm^{3}$. $\rho=\frac{125.3}{77.056}\approx1.63$ g/$cm^{3}$

Answer:

$1.63$ g/$cm^{3}$