Chapter 5, Problem 99E

Interpretation Introduction

Interpretation: The partial pressures hydrogen gas in the given sample and number of grams of zinc is reacted in sample are needed to be determined.

Concept introduction:

• Partial pressure of a gas in a mixture of gases is the pressure of that gas when it alone.
• Total pressure of a flask containing mixture of gases is the sum of individual partial pressures of constituted gases.

• Number of moles of a substance, According to ideal gas equation,

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

• Number of grams of a substance from its number of moles is,

$\text{Number of moles}\text{×}\text{Molecular}\text{mass in grams}\text{=}\text{Number}\text{of}\text{grams}$