Aspherical balloon is made from a material whose mass is 3.30 kg. the thickness of the material is negligible compared to the 1.25 m radius of the balloon. the balloon is filled with helium (he) at a temperature of 345 k and just floats in air, neither rising nor falling. the density of the surrounding air is 1.19 kg/m³ and the molar mass of helium is 4.0026×10-3 kg/mol. find the absolute pressure of the helium gas.

563712.04903 Pa

Explanation:

m = Mass of material = 3.3 kg

r = Radius of sphere = 1.25 m

v = Volume of balloon =

M = Molar mass of helium =

= Density of surrounding air =

R = Gas constant = 8.314 J/mol K

T = Temperature = 345 K

Weight of balloon + Weight of helium = Weight of air displaced

Mass of helium is 6.4356 kg

Moles of helium

Ideal gas law

The absolute pressure of the Helium gas is 563712.04903 Pa

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures