Help me vddfdhj

The decreasing order of number of atoms will be the same as decreasing order of the number of moles.

For a given mass of the different gases, number of moles is inversely proportional to the molar mass of the gas.

 n u m b e r space o f space m o l e s space space space equals space space fraction numerator G i v e n space m a s s over denominator M o l a r space M a s s end fraction

Gas Molar Mass(g/mol)
  O2   32
  CO2   44
  NH3   17

N u m b e r space o f space m o l e s space o f space O subscript 2 space equals space fraction numerator 10 space g over denominator 32 space g divided by m o l end fraction space equals space 0.3125 space

Since each molecule of O2 contains 2 atoms, the number of moles of O-atoms = 2cross times0.3125 = 0.625

N u m b e r space o f space m o l e s space o f space C O subscript 2 space equals space fraction numerator 10 space g over denominator 44 space g divided by m o l end fraction space equals space 0.2272 space

Since each molecule of CO2 contains 3 atoms, the number of moles of atoms = 3cross times0.2272 = 0.68181

N u m b e r space o f space m o l e s space o f space N H subscript 3 space equals space fraction numerator 10 space g over denominator 17 space g divided by m o l end fraction space equals 0.5882

Since each molecule of NH3 contains 4 atoms, the number of moles of atoms = 4cross times0.5882 = 2.3529

Thus the decreasing order of number of atoms is: NH3 > CO> O2

 

  • 0
What are you looking for?