   Chapter 3, Problem 57E

Chapter
Section
Textbook Problem

What mass of compound is present in 5.00 moles of each of the compounds in Exercise 5 1?

(a)

Interpretation Introduction

Interpretation: The number of moles of compound is given. By using the number of moles, the mass of each compound given in exercise 51 is to be determined.

Concept introduction: The atomic mass is defined as the sum of number of protons and number of neutrons.

Molar mass of a substance is defined as the mass of the substance in gram of one mole of that compound.

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

To determine: The mass of compound in 5.00 moles of NH3 .

Explanation

Given

The moles of NH3 is 5.00 .

The molar mass of NH3 is,

(14.006+3×1.0079)g/mol=17.0297g/mol

Formula

The mass of compound in NH3 is calculated using the formula,

MolesofNH3=MassofNH3MolarmassofNH3MassofNH3=

(b)

Interpretation Introduction

Interpretation: The number of moles of compound is given. By using the number of moles, the mass of each compound given in exercise 51 is to be determined.

Concept introduction: The atomic mass is defined as the sum of number of protons and number of neutrons.

Molar mass of a substance is defined as the mass of the substance in gram of one mole of that compound.

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

To determine: The mass of compound in 5.00 moles of N2H4 .

(c)

Interpretation Introduction

Interpretation: The number of moles of compound is given. By using the number of moles, the mass of each compound given in exercise 51 is to be determined.

Concept introduction: The atomic mass is defined as the sum of number of protons and number of neutrons.

Molar mass of a substance is defined as the mass of the substance in gram of one mole of that compound.

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

To determine: The mass of compound in 5.00 moles of (NH4)2Cr2O7 .

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