The number of atoms of 4.25 g of NH3 is
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Answer:
As mole=given mass/molecular mass.So mole of NH3 =4.25/20=425/2000. = 0.25 mole So number of atoms=0.25×6.022×10^23 atoms. As molecular mass of NH3 is 14+3=17g.
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Answer:
Molar mass NH3 = 14+3 = 17g/mol
given mass = 4.25g
no of moles = 4.25/17 = 0.25 mol of NH3
1 mol of NH3 contains 6.022*10^23 molecules
0.25 mol NH3 contains 0.25*6.022*10^23 = 1.5055*10^23 molecules
1 molecule of NH3 contains 4 atoms
Number of atoms in 1.5055*10^23 molecules = 4*1.5055*10^23 atoms.
The correct answer is = 6.022*10^23 atoms
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