The molecule which contains largest number of moles is to be identified from the given options. Concept introduction: Molar masses of H 2 O , C O 2 , B r 2 and H F are 18g, 44g, 159.8g and 20g respectively. Conversion formula for mass of an atom into number moles, N u m b e r o f m o l e s = M a s s i n g r a m s M o l a r m a s s Conversion formula for number of molecules and number of moles, N u m b e r o f m o l e c u l e s = n u m b e r o f m o l e s × 6.022 × 10 23 m o l e c u l e s / m o l

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Chapter 2.9, Problem 4RC

Interpretation Introduction

Interpretation: The molecule which contains largest number of moles is to be identified from the given options.

Concept introduction:

Molar masses of H2O , CO2 , Br2 and HF are 18g, 44g, 159.8g and 20g respectively.

Conversion formula for mass of an atom into number moles,

Number of moles = Mass in grams Molar mass

Conversion formula for number of molecules and number of moles,

Number of molecules = number of moles× 6.022×1023molecules/mol

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