Chapter 5, Problem 164CP

(a)

Interpretation Introduction

Interpretation:

or the given conditions, the minimum number of $\text{10L}$-balloons required to lift a $\text{50lb}$-child should be determined.

Concept introduction:

• Equation finding number of moles from its given mass is,

  $\text{Number of moles}\text{=}\frac{\text{Given}\text{mass}}{\text{Molecular}\text{mass}}$

• Equation findingVolume of a gas, according to ideal gas equation,

$\text{Volume}\text{=}\frac{\text{Number}\text{of}\text{moles}\times \text{R}\text{×}\text{Temperature}}{\text{Pressure}}$

(b)

Interpretation Introduction

Interpretation:

or the given conditions, the minimum number of $\text{10L}$-balloons required to lift a $\text{50lb}$-child should be determined.

Concept introduction:

• Equation finding number of moles from its given mass is,

  $\text{Number of moles}\text{=}\frac{\text{Given}\text{mass}}{\text{Molecular}\text{mass}}$

• Equation findingVolume of a gas, according to ideal gas equation,

$\text{Volume}\text{=}\frac{\text{Number}\text{of}\text{moles}\times \text{R}\text{×}\text{Temperature}}{\text{Pressure}}$