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1.How many oxygen atoms, how many moles of oxygen are found in a sample that contains 4x10'4 H;PO, molecules (MĦ3PO4 : 98 g mol·')

1.How many oxygen atoms, how many moles of oxygen are found in a sample that contains 4x10'4 H;PO, molecules (MĦ3PO4 : 98 g mol·')

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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1.How many oxygen atoms, how many moles of oxygen are found in a sample that contains 4x1014 H;PO4 molecules (MH3PO4: 98 g mol')
Transcribed Image Text:1.How many oxygen atoms, how many moles of oxygen are found in a sample that contains 4x1014 H;PO4 molecules (MH3PO4: 98 g mol')
Expert Solution
Step 1 Moles and atoms of Oxygen

Given:  4*1014 molecules of H₃PO4

            Molecular weight of H₃PO4 = MH3PO4 = 98 g/mol

Required: Moles and atoms of Oxygen in 4*1014 molecules of H₃PO4 =?

Solution: 

A molecule of H₃PO4 contains: 3 H, 1 P, and 4 Oxygen atoms

Thus, 4*1014 molecules of H₃PO4  contains:   4×1014×4 = 16×1014  Oxygen atoms   (Answer A)

 

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