Question

• 87. the density of dry air measured at 25°c is 1.19×10⁻³ g/cm³. what is the volume of 50.0 g of air?

Explanation:

Step1: Recall density formula

Density $
ho=\frac{m}{V}$, where $
ho$ is density, $m$ is mass and $V$ is volume. We need to solve for $V$, so $V = \frac{m}{
ho}$.

Step2: Substitute given values

Given $m = 50.0\ g$ and $
ho=1.19\times 10^{-3}\ g/cm^{3}$. Then $V=\frac{50.0\ g}{1.19\times 10^{-3}\ g/cm^{3}}$.

Step3: Calculate volume

$V=\frac{50.0}{1.19\times 10^{-3}}\ cm^{3}\approx4.20\times 10^{4}\ cm^{3}$

Answer:

$4.20\times 10^{4}\ cm^{3}$