Q. 64.1( 9 Votes )

Which of the foll A. 18g of H2O

B. 18g of O2

C. 18g of CO2

D. 18g of CH4

Answer :

18g of CH4 contains a maximum number of atoms.

Molar mass of CH4 = The atomic mass of C + 4 X the atomic mass of H


= 12 + 4


= 16g


Number of atoms = 1 + 4 = 5


Thus,


Number of atoms = Number of atoms in the molecule×


=


= 5.63 NA


The number of atoms in 18g of H2O :


Molar mass of H2O = 18g; Number of atoms = 2 + 1 = 3


=


= 3 NA


The number of atoms in 18g of O2:


Molar mass of O2 = 32g; Number of atoms in O2 = 1 + 1 = 2


=


= 1.12 NA


The number of atoms in 18g of CO2 :


Molar mass of CO2 = 44g;


=


= 1.23 NA

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Atoms and Molecules: H.O.T.S.Atoms and Molecules: H.O.T.S.Atoms and Molecules: H.O.T.S.38 mins
NCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and Molecules48 mins
Mastering in ValencyMastering in ValencyMastering in Valency33 mins
NCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and Molecules43 mins
Quiz | Solve Imp. Qs. on Ions,Molecules and CompoundsQuiz | Solve Imp. Qs. on Ions,Molecules and CompoundsQuiz | Solve Imp. Qs. on Ions,Molecules and Compounds26 mins
Smart Revision | Master the Art of Writing Chemical FormulaeSmart Revision | Master the Art of Writing Chemical FormulaeSmart Revision | Master the Art of Writing Chemical Formulae46 mins
Smart Revision | Basic Concept of MoleSmart Revision | Basic Concept of MoleSmart Revision | Basic Concept of Mole51 mins
Atomic ModelsAtomic ModelsAtomic Models53 mins
Smart Revision | Important Questions of Atoms & MoleculesSmart Revision | Important Questions of Atoms & MoleculesSmart Revision | Important Questions of Atoms & Molecules36 mins
NCERT | Laws of Chemical Combinations - INCERT | Laws of Chemical Combinations - INCERT | Laws of Chemical Combinations - I43 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

(a) Calculate theTogether with Science

Calculate the masTogether with Science

(a) Define the teTogether with Science

Calculate:
</p
Together with Science

Calculate the masTogether with Science

In photosynthesisNCERT Science - Exemplar

How many grams ofLakhmir Singh & Manjit Kaur - Chemistry

Calculate the masAll In One - Science

How many atoms arLakhmir Singh & Manjit Kaur - Chemistry