Problem 16.20

16.20.
If the volume of one balloon is V₀, then the final volume of the gas can be given by the expression NV₀, where N is the number of balloons that we inflated.
Then since the helium undergoes no change in temperature,
P₁V₁ = P₂V₂
P₁V₁ = NV₀P₂
$N = \frac{P_{1}V_{1}}{V_{0}P_{2}}$
$N = \frac{(150)(.1)}{\frac{4}{3}\pi (1.5)^{3} (1.2)}$
N = 884 balloons