# (a) Interpretation: The number of moles in 2.45 g Fe 2 O 3 should be calculated. Concept Introduction: The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H − 1 is 1.008 a m u . The molar mass of any element is the mass of 6.02 × 10 23 atoms or 1 mole of that element. The unit of molar mass is grams. Mass of any substance can be calculated as follows: Mass in gram = Number of moles × Molar mass Number of moles can be calculated as follows; Number of moles = mass in g molar mass .

### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425

### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425

#### Solutions

Chapter 9, Problem 15CR
Interpretation Introduction

## (a)Interpretation:The number of moles in 2.45 g Fe2O3 should be calculated.Concept Introduction:The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H−1  is 1.008 amu.The molar mass of any element is the mass of 6.02×1023 atoms or 1 mole of that element. The unit of molar mass is grams.Mass of any substance can be calculated as follows:Mass in gram = Number of moles×Molar massNumber of moles can be calculated as follows;Number of moles = mass in gmolar mass.

Interpretation Introduction

### (b)Interpretation:The number of moles in 2.45 g of P4(s) should be calculated.Concept Introduction:The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H−1  is 1.008 amu.The molar mass of any element is the mass of 6.02×1023 atoms or 1 mole of that element. The unit of molar mass is grams.Mass of any substance can be calculated as follows:Mass in gram = Number of moles×Molar massNumber of moles can be calculated as follows;Number of moles = mass in gmolar mass.

Interpretation Introduction

### (c)Interpretation:The number of moles in 2.45 g of Cl2(g) should be calculated.Concept Introduction:The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H−1  is 1.008 amu.The molar mass of any element is the mass of 6.02×1023 atoms or 1 mole of that element. The unit of molar mass is grams.Mass of any substance can be calculated as follows:Mass in gram = Number of moles×Molar massNumber of moles can be calculated as follows;Number of moles = mass in gmolar mass.

Interpretation Introduction

### (d)Interpretation:The number of moles in 2.45 g of Hg2O(s) should be calculated.Concept Introduction:The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H−1  is 1.008 amu.The molar mass of any element is the mass of 6.02×1023 atoms or 1 mole of that element. The unit of molar mass is grams.Mass of any substance can be calculated as follows:Mass in gram = Number of moles×Molar massNumber of moles can be calculated as follows;Number of moles = mass in gmolar mass.

Interpretation Introduction

### (e)Interpretation:The number of moles in 2.45 g of HgO should be calculated.Concept Introduction:The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H−1  is 1.008 amu.The molar mass of any element is the mass of 6.02×1023 atoms or 1 mole of that element. The unit of molar mass is grams.Mass of any substance can be calculated as follows:Mass in gram = Number of moles×Molar massNumber of moles can be calculated as follows;Number of moles = mass in gmolar mass.

Interpretation Introduction

### (f)Interpretation:The number of moles in 2.45 g of Ca(NO3)2(s) should be calculated.Concept Introduction:The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H−1  is 1.008 amu.The molar mass of any element is the mass of 6.02×1023 atoms or 1 mole of that element. The unit of molar mass is grams.Mass of any substance can be calculated as follows:Mass in gram = Number of moles×Molar massNumber of moles can be calculated as follows;Number of moles = mass in gmolar mass.

Interpretation Introduction

### (g)Interpretation:The number of moles in 2.45 g of C3H8(g) should be calculated.Concept Introduction:The total number of protons and number of neutrons of any element is called, atomic mass of that element. It is a decimal digit for example the atomic mass of H−1  is 1.008 amu.The molar mass of any element is the mass of 6.02×1023 atoms or 1 mole of that element. The unit of molar mass is grams.Mass of any substance can be calculated as follows:Mass in gram = Number of moles×Molar massNumber of moles can be calculated as follows;Number of moles = mass in gmolar mass.

Interpretation Introduction

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