Chapter 11.7, Problem 62PP

(a)

Interpretation Introduction

Interpretation:

The molar mass of given gas should be determined.

2.90 g of a gas that occupies 0.500 L at $0°\mathrm{C}$ and 1.00 atm (STP)

Concept Introduction:

Ideal gas law gives the relationship between pressure (P), volume (V), temperature (T) and amount of gas or number of moles (n).

The equation for Ideal gas law is:

PV = nRT

Where, P = pressure of a gas

V = volume of a gas

n = number of moles of a gas

T = temperature of a gas

R = Ideal gas constant ( $0.082057L{\text{ atm mol}}^{-}{}^1{\text{K}}^{-}{}^1$ )

Number of moles is defined as the ratio of given mass to the molar mass.

The mathematical expression is given by:

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

(b)

Interpretation Introduction

Interpretation:

The molar mass of given gas should be determined.

1.43 g of a gas that occupies 2.00 L at $0°\mathrm{C}$ and 760 mmHg (STP)

Concept Introduction:

Ideal gas law gives the relationship between pressure (P), volume (V), temperature (T) and amount of gas or number of moles (n).

The equation for Ideal gas law is:

PV = nRT

Where, P = pressure of a gas

V = volume of a gas

n = number of moles of a gas

T = temperature of a gas

R = Ideal gas constant ( $0.082057L{\text{ atm mol}}^{-}{}^1{\text{K}}^{-}{}^1$ )

Number of moles is defined as the ratio of given mass to the molar mass.

The mathematical expression is given by:

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

(c)

Interpretation Introduction

Interpretation:

The molar mass of given gas should be determined.

0.726 g of a gas that occupies 855mL at $18°\mathrm{C}$ and 1.20 atm

Concept Introduction:

Ideal gas law gives the relationship between pressure (P), volume (V), temperature (T) and amount of gas or number of moles (n).

The equation for Ideal gas law is:

PV = nRT

Where, P = pressure of a gas

V = volume of a gas

n = number of moles of a gas

T = temperature of a gas

R = Ideal gas constant ( $0.082057L{\text{ atm mol}}^{-}{}^1{\text{K}}^{-}{}^1$ )

Number of moles is defined as the ratio of given mass to the molar mass.

The mathematical expression is given by:

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

(d)

Interpretation Introduction

Interpretation:

The molar mass of given gas should be determined.

2.32 g of a gas that occupies 1.23 L at $25°\mathrm{C}$ and 685 mmHg (STP)

Concept Introduction:

Ideal gas law gives the relationship between pressure (P), volume (V), temperature (T) and amount of gas or number of moles (n).

The equation for Ideal gas law is:

PV = nRT

Where, P = pressure of a gas

V = volume of a gas

n = number of moles of a gas

T = temperature of a gas

R = Ideal gas constant ( $0.082057L{\text{ atm mol}}^{-}{}^1{\text{K}}^{-}{}^1$ )

Number of moles is defined as the ratio of given mass to the molar mass.

The mathematical expression is given by:

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