Foundation
Chemistry Foundation
Mole Concept and Calculation
Question

The largest number of molecules among the following is -

28g of CO    

36g of H2O    

46g of C2H5OH

54g of N2O5

JEE Advance
College PredictorLive

Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.

Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA

Solution

No. of molecules in each are as follows -
    28 g of CO = 6.023 ×1023 molecules
    46 g of C2H5OH = 6.023 × 1023 molecules
    36 g of H2O = 12.046 × 1023 molecules
    54 g of N2O5 = 3.011 × 1023 molecules
    Hence no. of molecules are maximum in 36 g of H2O.