   Chapter 2, Problem 121GQ

Chapter
Section
Textbook Problem

A drop of water has a volume of about 0.050 mL. How many molecules of water are in a drop of water? (Assume water has a density of 1.00 g/cm3.)

Interpretation Introduction

Interpretation: The number of molecules present in one drop of water which has a volume of 0.050mL should be calculated.

Concept Introduction:

• Mass=Density×Volume
• Moleofsubstance=GramofsubstanceMolarmass
Explanation

Given,

Volume of water drop is 0.050mL

Massofwaterdrop=Densityofwater×Volumeofwater =1.00g/cm3×0.050mL =0.050g

Molesofwater =0

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