(a) Interpretation: The molar mass of cyanocobalamin upto two decimal places is to be calculated. Concept Introduction: A molar mass of a substance is the mass of the substance divided by the number of moles of the substance. The SI unit of molar mass of kg/mol and other unit is g/mol . The formula to calculate the molar mass is, Molar mass of the substance = Mass of the substance g Number of moles .

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Introductory Chemistry: A Foundati...

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

Introductory Chemistry: A Foundati...

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

Solutions

Chapter 8, Problem 128CP
Interpretation Introduction

(a)

Interpretation:

The molar mass of cyanocobalamin upto two decimal places is to be calculated.

Concept Introduction:

A molar mass of a substance is the mass of the substance divided by the number of moles of the substance. The SI unit of molar mass of kg/mol and other unit is g/mol.

The formula to calculate the molar mass is,

Molar mass of the substance= Mass of the substancegNumberofmoles.

Interpretation Introduction

(b)

Interpretation:

The number of moles of cyanaocobalamin molecules present in 250mg of cyanaocobalamin is to be stated.

Concept Introduction:

A mole of a substance contains exactly 6.02214076×1023 of atoms/molecules. It is used to measure the amount of the substance in SI units.

The formula to calculate the number of moles is:

Numberofmoles= Mass of the substancegMolar mass of the substance.

Interpretation Introduction

(c)

Interpretation:

The mass of 0.60mol of cyanocobalamine is to be stated.

Concept Introduction:

A mole of a substance contains exactly 6.02214076×1023 of atoms/molecules. It is used to measure the amount of the substance in SI units.

The formula to calculate the number of moles is:

Numberofmoles= Mass of the substancegMolar mass of the substance.

Interpretation Introduction

(d)

Interpretation:

The atoms of hydrogen that are present in 1.0mol of cyanocobalamin are to be stated.

Concept Introduction:

A mole of a substance contains exactly 6.02214076×1023 of atoms/molecules. It is used to measure the amount of the substance in SI units.

The formula to calculate the number of moles is:

Numberofmoles= Mass of the substancegMolar mass of the substance.

Interpretation Introduction

(e)

Interpretation:

The mass of 1×107molecules of cyanocobalamine is to be stated.

Concept Introduction:

A mole of a substance contains exactly 6.02214076×1023 of atoms/molecules. It is used to measure the amount of the substance in SI units.

The formula to calculate the number of moles is:

Numberofmoles= Mass of the substancegMolar mass of the substance.

Interpretation Introduction

(f)

Interpretation:

The mass of one molecule of cyanocobalamine is to be stated.

Concept Introduction:

A mole of a substance contains exactly 6.02214076×1023 of atoms/molecules. It is used to measure the amount of the substance in SI units.

The formula to calculate the number of moles is:

Numberofmoles= Mass of the substancegMolar mass of the substance.

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