A solution is prepared at 20°C by mixing two hydrocarbons in the following proportions: 2.00 molpentane and 200.0 mL heptane.CpdMM (g/mol)density (g/mL)Vapor P (mm Hg)pentane (CSH12)72.1500.626420.heptane (C-H16)100.2040.679536.0Calculate the moles of heptane. mol (heptane) =The mole fraction of pentane isThe mole fraction of heptane is. Give these as decimal fractions.The vapor pressure of pentane above the solution at 20°C isThe vapor pressure of heptane above the solution at 20° isThe vapor pressure of the solution at 20°C isThe mole fraction of pentane in the gas phase isCalculate the volume of pentane in the solution.Calculate the concentration of pentane in the solution in % by volume.

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pd MM (g/mol) density entane (CSH12) 72.150 0.626

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

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 be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

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A solution is prepared at 20°C by mixing two hydrocarbons in the following proportions: 2.00 mol
pentane and 200.0 mL heptane.
Cpd
MM (g/mol)
density (g/mL)
Vapor P (mm Hg)
pentane (CSH12)
72.150
0.626
420.
heptane (C-H16)
100.204
0.6795
36.0
Calculate the moles of heptane. mol (heptane) =
The mole fraction of pentane is
The mole fraction of heptane is
. Give these as decimal fractions.
The vapor pressure of pentane above the solution at 20°C is
The vapor pressure of heptane above the solution at 20° is
The vapor pressure of the solution at 20°C is
The mole fraction of pentane in the gas phase is
Calculate the volume of pentane in the solution.
Calculate the concentration of pentane in the solution in % by volume.

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