Question

2 the density of zinc is 7.1 grams per cubic centimeter. the table shows the mass (in grams) and the volume (in cubic centimeters) of four substances. substance mass (grams) volume (cubic centimeters) 1 3.0 21.3 2 7.1 0.5 3 14.2 2.0 4 2.2 4.9 which of these substances is zinc?

Explanation:

Step1: Recall density formula

The density formula is $
ho=\frac{m}{V}$, where $
ho$ is density, $m$ is mass and $V$ is volume.

Step2: Calculate density of Substance 1

$
ho_1=\frac{m_1}{V_1}=\frac{3.0}{21.3}\approx0.14$ g/cm³

Step3: Calculate density of Substance 2

$
ho_2=\frac{m_2}{V_2}=\frac{7.1}{0.5} = 14.2$ g/cm³

Step4: Calculate density of Substance 3

$
ho_3=\frac{m_3}{V_3}=\frac{14.2}{2.0}=7.1$ g/cm³

Step5: Calculate density of Substance 4

$
ho_4=\frac{m_4}{V_4}=\frac{2.2}{4.9}\approx0.45$ g/cm³

Answer:

Substance 3