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lianna [129]
3 years ago
12

How many nitrogen atoms are in 2.79 mo.of NH3

Chemistry
1 answer:
alexandr1967 [171]3 years ago
5 0
1 mol of any particles has 6.02 * 10 ²³ particles.

If we look at 1 NH3 (1 mol NH3 or 1 molecule NH3), we can see that 1 molecule NH3 has 1 atom of N and 3 atoms of H; also 1 mole of NH3 has 1 mole of N atoms and 3 moles of H atoms.

So, 1 mol of NH3 has 1 mol of N atoms,
 and 2.79 mol NH3 have 2.79 mol of N atoms.

2.79 mol of N atoms* 6.02 * 10 ²³ N atoms/ 1 mol N atoms = 1.68*10²⁴ N-atoms 

 Answer is 1.68*10²⁴ N-atoms. 
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Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

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12.5\ g=[A_0]e^{-0.02297\times 90.6}

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