Question

the chart below shows the density of five gases.
density of gases
gas density (g/l)
helium 0.178
neon 0.900
argon 1.78
krypton 3.71
xenon 5.85
a sample of gas has a volume of 4.52 l. if its mass is 8.05 g (density = 1.78 g/l), what is the identity of the gas?
argon
helium
neon
krypton

Explanation:

Step1: Recall density formula

Density $
ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume. Here, density is already given as $1.78$ g/L.

Step2: Match with table

We look at the table of gas - densities. Helium has density $0.178$ g/L, Neon has density $0.900$ g/L, Argon has density $1.78$ g/L, Krypton has density $3.71$ g/L and Xenon has density $5.85$ g/L.

Answer:

A. Argon