Determine the molecular formulas to which the following empirical formulas and molar masses pertain. a. SNH (188.35 g/mol) b. NPC1 2 (347.64 g/mol) c. CoC 4 O 4 (341.94 g/mol) d. SN (184.32 g/mol)

Interpretation: The empirical formula and molar masses for different compounds are given. By using these values, the molecular formula is to be calculated for each of the compound.

Concept introduction: The smallest whole number ratio of atoms in a compound is known as empirical formula.

The formula that gives the number of atoms present in a molecule is known as molecular formula.

To determine: The molecular formula of the compound having empirical formula SNH .

Explanation of Solution

Given

The molar mass of SNH is 188.35 g/mol .

The atomic mass of sulfur (S) is 32.065 g/mol .

The atomic mass of nitrogen (N) is 14.006 g/mol .

The atomic mass of hydrogen (H) is 1.008 g/mol .

The empirical formula mass of any compound can be calculated by adding of atomic mass of individual atoms present in it.

Hence, the empirical formula mass of SNH is,

(32.065 g/mol+14.006 g/mol+1.008 g/mol)=47.079 g/mol

Formula

The molecular formula is calculated by using the formula,

Molecular formula=[Empirical formula]n

Where,

n is the ratio of molar mass and empirical formula mass of that compound

Answer 6

(b)

Interpretation Introduction

Interpretation: The empirical formula and molar masses for different compounds are given. By using these values, the molecular formula is to be calculated for each of the compound.

Concept introduction: The smallest whole number ratio of atoms in a compound is known as empirical formula.

The formula that gives the number of atoms present in a molecule is known as molecular formula.

To determine: The molecular formula of the compound having empirical formula NPCl2 .

Answer 7

(c)

Interpretation Introduction

Interpretation: The empirical formula and molar masses for different compounds are given. By using these values, the molecular formula is to be calculated for each of the compound.

Concept introduction: The smallest whole number ratio of atoms in a compound is known as empirical formula.

The formula that gives the number of atoms present in a molecule is known as molecular formula.

To determine: The molecular formula of the compound having empirical formula CoC4O4 .

Answer 8

(d)

Interpretation Introduction

Interpretation: The empirical formula and molar masses for different compounds are given. By using these values, the molecular formula is to be calculated for each of the compound.

Concept introduction: The smallest whole number ratio of atoms in a compound is known as empirical formula.

The formula that gives the number of atoms present in a molecule is known as molecular formula.

To determine: The molecular formula of the compound having empirical formula SN .

Determine the molecular formulas to which the following empirical formulas and molar masses pertain. a. SNH (188.35 g/mol) b. NPC1 2 (347.64 g/mol) c. CoC 4 O 4 (341.94 g/mol) d. SN (184.32 g/mol)

Chemistry: An Atoms First Approach

Solutions

Chemistry: An Atoms First Approach

Determine the molecular formulas to which the following empirical formulas and molar masses pertain.

a. SNH (188.35 g/mol)

b. NPC1₂ (347.64 g/mol)

c. CoC₄O₄ (341.94 g/mol)

d. SN (184.32 g/mol)

Explanation of Solution

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Chapter 5 Solutions

Additional Science Textbook Solutions

Determine the molecular formulas to which the following empirical formulas and molar masses pertain. a. SNH (188.35 g/mol) b. NPC1 2 (347.64 g/mol) c. CoC 4 O 4 (341.94 g/mol) d. SN (184.32 g/mol)

Chemistry: An Atoms First Approach

Solutions

Chemistry: An Atoms First Approach