Question

A balloon contains 5470cm3 of gas and has a mass of 10.24g. The mass of the empty balloon is2.42g. What is the density of the gas.

Answer 1

Density is the mass of substance per unit volume of a substance. to solve the problem, first calculate the mass of the gas.
mass gas = ( mass of balloon with gas ) - ( mass of balloon )
mass gas = 10.24 g - 2.42 g
mass gas = 7.82 g

so the density
density = m / v = 7.82 g / 5470 cm3
density = 0.00145 g / cm3

Answer 2

Answer: The density of gas is $1.43\times 10^{-3}g/cm^3$

Explanation:

We are given:

Mass of empty balloon, $m_1$ = 2.42 g

Mass of balloon with gas, $m_2$ = 10.24 g

Mass of gas = $m_2-m_1=10.24-2.42=7.82g$

To calculate density of a substance, we use the equation:

$\text{Density of a substance}=\frac{\text{Mass of a substance}}{\text{Volume of a substance}}$

We are given:

Mass of gas = 7.82 g

Volume of gas = $5470cm^3$

Putting values in above equation, we get:

$\text{Density of gas}=\frac{7.82g}{5470cm^3}\\\\\text{Density of gas}=1.43\times 10^{-3}g/cm^3$

Hence, the density of gas is $1.43\times 10^{-3}g/cm^3$