Answer: Mass of gas is 0.001 pounds.
Explanation:
Density is defined as the mass contained per unit volume.
[tex]Density=\frac{mass}{Volume}[/tex]
Given : Mass of gas = ?
Density of gas = [tex]1.29g/L[/tex]
Volume of gas = 389 ml = 0.389 L (1L=1000ml)
Putting in the values we get:
[tex]1.29g/L=\frac{mass}{0.389L}[/tex]
[tex]mass=0.5grams[/tex]
[tex]mass=0.5\times 0.002lb=0.001lb[/tex] (1g =0.002 lb)
Thus the mass of gas is 0.001 pounds.
