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07-05-2017
Chemistry

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what is the number of nitrogen atoms in 12g aluminium nitrate, Al(NO3)3?

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Аноним Аноним

08-05-2017

The 3 outside means to multiply the inside by that number. AL(NO2)3 has
1 N inside
1 x 3 = 3 nitrogen atoms

The molar mass of Al(NO3)3= 212.996 g/mol
nitrogen is 14 g/mol and is 19.7% if the molar mass
19.7% of 12 g = 2.354g
2.354/14 = 0.196 N

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