- How many moles of vapor are there in a sample that completely fills a 125-mL flask at . 85.5°C and 763 torr? n 21

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter10: Solids, Liquids, And Phase Transitions
Section: Chapter Questions
Problem 5P
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Question
9
Prelaboratory
Name
Mass of a
Volatile Liquid
Questions
Mari Coronel
Laboratory Section.
Show your work, include units, and report the correct number of significant figures for all
calculations.
1. How many moles of vapor are there in a sample that completely fills a 125-mL flask at
85.5°C and 763 torr?
n=pr
QF
85.5°C
с 358, 65к
763 forr = 1.004 atm
=
125 ml
125 002
N = pr
n = (1.004 atm) (125002)
358.65K
n = 34.9 moles of Vapor
(continued on next page)
77
Transcribed Image Text:9 Prelaboratory Name Mass of a Volatile Liquid Questions Mari Coronel Laboratory Section. Show your work, include units, and report the correct number of significant figures for all calculations. 1. How many moles of vapor are there in a sample that completely fills a 125-mL flask at 85.5°C and 763 torr? n=pr QF 85.5°C с 358, 65к 763 forr = 1.004 atm = 125 ml 125 002 N = pr n = (1.004 atm) (125002) 358.65K n = 34.9 moles of Vapor (continued on next page) 77
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