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2 years ago

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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2 years ago

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2 years ago

Gases tend to deviate from the ideal gas law at

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Answer:

Gases tend to deviate from ideal gas law at high pressures and low temperatures.

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The main statements from molecular kinetic theory to describe an ideal gas is that 1) the gas particles occupy a neglictible fraction of the total volume of the gas, and 2) there is not force of attraction between gas particles.

HIgh pressure means that the gas particles will be forced closer to each other, making that the mean distance between the particles be realtively more important and their volume less neglictible. This is a violation the first assumption described above.

Since the temperature is directly related to the kinetic energy, and the latter with the movement of the particles (average speed), low temperatures lead to the molecules being less independent of each other, i.e. the forces between the molecules will count more . This fact constitutes a violation of the second principle established in the first paragraph.

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3 years ago

A 28.5 gram piece of iron is added to a graduated cylinder containing 45.5 mL of water. The water in the cylinder rises to the 4

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7.91 g/ml is the density of the iron piece of 28.5 gms.

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The density of a substance is defined as the volume it occupies. It tells the matter present in a substance.

The density is mass per unit volume and is denoted by p.

The formula for density is given by:

density (p) = $\frac{mass}{volume}$

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The initial volume of water was 45.5 ml, when iron piece of 28.5 grams was added the final volume was 49.1 ml.

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p = $\frac{28.5}{49.1-45.5}$

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2 years ago

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