Question

How many billions of molecules in 0.078 microgram of NO₂?

Answer 1

Answer

Molar mass of No = 46.0055 g more? I mole of Nog consists of frogadre no. of molecules of No - 6.022 x 10t molecules Mass of given Nog = 0.018 microgram So mass of nog = 0.078 x 10 - 7.8 x 10 g Now, 46.0055 g nog contains Nog molecules = 6-022x10 23 7.8 x 100 g nog would contain Nog molecules 6.022 x 10 23 X 7.8 x 46.0055 = 1.02 X 10l molecules = 100 molecules 1 I billion molecules No of molecules in billions = Total molecules - molecules in 1 billion 7.02 x 10 = 1.02 x 100 billion molecules

Number of molecules of Nitrogen dioxide is equal to

1.02 × 10^6 molecules.