Chapter 10, Problem 19CI

(a)

Interpretation Introduction

Interpretation:

The Lewis structure of acetone needs to be determined.

Concept Introduction :

Lewis structure shows the arrangement of valence electrons in an atom of molecule. The electrons involved in bonding are represented as bonds between the atoms and electrons which are not involved in bonding are represented as lone pair of electrons on the atom.

(b)

Interpretation Introduction

Interpretation:

The molecular formula and molar mass of acetone needs to be determined.

Concept Introduction : Molecular formula of a compound can be determined from its structure by calculating the total number of atoms present in it.

Molar mass is calculated by taking sum of atomic mass of all the atoms in the molecule.

(c)

Interpretation Introduction

Interpretation:

A balanced chemical equation for complete combustion of acetone needs to be determined.

Concept Introduction :

In a balanced chemical equation, there is equal number of atoms of same element present in both sides of the reaction arrow.

(d)

Interpretation Introduction

Interpretation:

Whether the combustion of acetone is exothermic or endothermic needs to be determined.

Concept Introduction :

If heat is released during the reaction, the reaction is considered as exothermic and if heat is required in the reaction then the reaction is considered as endothermic reaction.

(e)

Interpretation Introduction

Interpretation:

The amount of heat released if 2.58 g of acetone reacts completely with oxygen needs to be determined.

Concept Introduction :

The number of moles can be calculated from mass and molar mass as follows:

  $n=\frac{m}{M}$

Here, m is mass and M is molar mass.

(f)

Interpretation Introduction

Interpretation:

The mass of oxygen gas required to react with 15.0 mL of acetone needs to be determined.

Concept Introduction :

The density is related to mass and volume as follows:

  $d=\frac{m}{V}$

Here, m is mass and V is volume.