The reaction of fluorine with ammonia produces dinitrogen tetrafluoride and hydrogen fluoride.

1 answer:

4 0

5F2 + 2NH3 --> N2F4 + 6HF
60.1g NH3 / 17g/mole = 3.54moles NH3 
3.54moles NH3 x (5 F2 / 2NH3) x 38g/mole = 335.85g required 

5.25g HF / 20g/mole = 0.262moles HF 
0.262moles HF x (2NH3 / 6HF) x 17g/mole = 1.49g required 

209g / 38g/mole = 5.5moles F2 
5.5moles F2 (1 N2F4 / 5F2) x 66g/mole = 72.6g produced 

Li3N + 3H2O --> NH3 + 3LiOH 
(37.7g / 34.7g/mole) x (3H2O / 1 Li3N) x 18g/mole = 58.67g required 

1.08moles Li3N (1NH3 / 1Li3N) x 6.022x10^23molecules/mole = 6.54x10^23 molecules 

10.3L at STP: 10.3L / 22.4L/mole = 0.46moles NH3 produced 
0.46moles NH3 x (1Li3N / 1NH3) x 34.7g/mole = 15.96g

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A mixture contains only NaCl and Al2(SO4)3. A 1.45-g sample of the mixture is dissolved in water, and an ex- cess of NaOH is add

chubhunter [2.5K]

Answer:

The mass percent of aluminum sulfate in the sample is 16.18%.

Explanation:

Mass of the sample = 1.45 g

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Mass of the precipitate = 0.107 g

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According to reaction, 2 moles of aluminum hydroxide is obtained from 1 mole of aluminum sulfate .

Then 0.001372 moles of aluminum hydroxide will be obtained from:

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The mass percent of aluminum sulfate in the sample:

$=\frac{ 0.2346 g}{1.45g}\times 100=16.18\%$

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3 years ago

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the mass of a 125 cm3 piece of material is 82.75 g. determine the density of this material . please explain

andre [41]

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3 years ago

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lesya692 [45]

Answer:

that's all I can do

your welcome