Ethanol, C2H5OH, has a density of 0.785 g/mL and a molar mass of 46.07 g/mol. How many moles of ethanol are present in 1.00 L of pure ethanol (A) 17.0 moles (B) 21.7 moles (C) 27.7 moles (D) 2.77 moles

Ethanol, C2H5OH, has a density of 0.785 g/mL and a molar mass of 46.07 g/mol. How many moles of ethanol are present in 1.00 L of pure ethanol (A) 17.0 moles (B) 21.7 moles (C) 27.7 moles (D) 2.77 moles

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter3: Molecules, Moles, And Chemical Equations

Section: Chapter Questions

Problem 3.42PAE

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Question

Ethanol, C₂H₅OH, has a density of 0.785 g/mL and a molar mass of 46.07 g/mol. How many moles of ethanol are present in 1.00 L of pure ethanol

(A) 17.0 moles

(B) 21.7 moles

(D) 2.77 moles

Expert Solution

Step 1

Solution :

Given,

Density of ethanol = 0.785g/mL means 0.785 g ethanol present in 1mL of ethanol

The molar mass of ethanol = 46.07 g/mol means 46.07g of ethanol is exactly 1 mole

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