20 Calculate the number of moles, molecules and total number of atoms
present in 17x10-kg of ammonia.
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Molar mass of NH3=14+3=17
Given Mass=17*10^-kg=1.7kg=1700 g
No of moles=Given Mass/Molar mass
>>1700/17=100 mol
No of atoms = No of moles* Avogadro's Number
>>100*6*10^23
>>6*10^25 atoms
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