Question

Ethanol is the substance commonly called alcohol. The density of liquid alcohol is $0.8 \mathrm{~g} / \mathrm{ml}$ at $293 \mathrm{~K}$. If $1.2$ moles of ethanol is needed for a particular experiment, what volume of ethanol should be measured out? (a) $55.2 \mathrm{ml}$ (b) $57.5 \mathrm{ml}$ (c) $69 \mathrm{ml}$ (d) $47.9 \mathrm{ml}$

Name: Problem 37, Chapter 1: Advanced Problems in Physical Chemistry for Competitive Examinations
Uploaded: 2021-07-04T07:38:13-08:00
Duration: 2 min 22 s
Channel: Kartik Indoliya
Description: Ethanol is the substance commonly called alcohol. The density of liquid alcohol is 0.8 g / ml at 293 K. If 1.2 moles of ethanol is needed for a particular experiment, what volume of ethanol should be measured out? (a) 55.2 ml (b) 57.5 ml (c) 69 ml (d) 47.9 ml

    Ethanol is the substance commonly called alcohol. The density of liquid alcohol is $0.8 \mathrm{~g} / \mathrm{ml}$ at $293 \mathrm{~K}$. If $1.2$ moles of ethanol is needed for a particular experiment, what volume of ethanol should be measured out?
(a) $55.2 \mathrm{ml}$
(b) $57.5 \mathrm{ml}$
(c) $69 \mathrm{ml}$
(d) $47.9 \mathrm{ml}$

Advanced Problems in Physical Chemistry for Competitive Examinations

Neeraj Kumar 2015 Edition

Chapter 1, Problem 37

Instant Answer

Solved by Expert Kartik Indoliya

07/04/2021

Step 1

The molar mass of ethanol is calculated as follows: \[ Molar~mass~of~ethanol = 2*(atomic~mass~of~C) + 5*(atomic~mass~of~H) + 1*(atomic~mass~of~O) + 1*(atomic~mass~of~H) \] \[ = 2*12 + 5*1 + 16 + 1 = 46~g/mol \] Show more…

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Ethanol is the substance commonly called alcohol. The density of liquid alcohol is $0.8 \mathrm{~g} / \mathrm{ml}$ at $293 \mathrm{~K}$. If $1.2$ moles of ethanol is needed for a particular experiment, what volume of ethanol should be measured out? (a) $55.2 \mathrm{ml}$ (b) $57.5 \mathrm{ml}$ (c) $69 \mathrm{ml}$ (d) $47.9 \mathrm{ml}$

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Key Concepts

Density

Density is a physical property that describes the mass of a substance per unit volume. It is used to convert between mass and volume, which is particularly important in laboratory contexts where substances are measured by volume but react based on mass.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole. It enables the conversion of moles, a count of particles, into mass, allowing for practical measurements in chemical experiments and reactions.

Mole Concept

The mole is a fundamental unit in chemistry used to quantify the amount of a substance. It relates the number of particles (atoms, molecules, ions) in a sample to a measurable amount of mass through the use of the substance's molar mass.

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