Explanation Magnesium phosphate is Mg 3 PO 4 2 . The molar mass of magnesium phosphate is calculated and is equals to- 262.85 g/mol . Given: The mass of calcium nitrate = 326.4 g . The number of moles is calculated by the formula, Number of moles = Given mass of substance Molar mass of substance Substitute the value of given mass and molar mass in the above formula. Number of moles = Given mass of substance Molar mass of substance = 326.4 262.85 = 1.24 moles Calcium nitrate is Ca NO 3 2 . The molar mass of magnesium phophate is calculated and is equals to- 164.08 g/mol . Given: The mass of magnesium phosphate = 303.0 g . The number of moles is calculated by the formula, Number of moles = Given mass of substance Molar mass of substance Substitute the value of given mass and molar mass in the above formula. Number of moles = Given mass of substance Molar mass of substance = 303.0 164.08 = 1.84 moles Potassium chromate is K 2 CrO 4

9th Edition

ISBN: 9781337399425

Author: Steven S. Zumdahl, Donald J. DeCoste

Publisher: Cengage Learning

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can b…

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Chapter 8, Problem 129CP

Interpretation Introduction

Interpretation:

The number of moles of the compounds is to be calculated.

Concept Introduction:

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

The formula for number of moles is:

Number of moles=Given mass of substanceMolar mass of substance.

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Chapter 8, Problem 128CP

Chapter 8, Problem 130CP

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Solution Summary: The author defines a mole as the presence of exactly 6.02214076times 1023 atoms/molecules.

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