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kenny6666 [7]
2 years ago
9

How does the separation of a mixture containing salt, sand and naphthalene support the law of conservation of matter

Chemistry
1 answer:
Elis [28]2 years ago
3 0

Answer:

Mixtures are not unique to chemistry; we encounter them on a daily basis. The food and drinks ... The mixture that will be separated in this experiment contains three components: Naphthalene ... Dissolving the table salt with water to extract it from the sand by filtration, and. 3. ... support the Law of Conservation of Matter.

Explanation:

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The decomposition of NI3 to form N2 and I2 releases −290.0 kJ of energy. The reaction can be represented as 2NI3(s)→N2(g)+3I2(g)
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Answer:

-7.34 kilo Joules is the change in enthaply when 20.0 grams of nitrogen triiodide decomposes.

Explanation:

Mass of nitrogen triiodide = 20.0 g

Moles of nitrogen triiodide = \frac{20.0 g}{395 g/mol}=0.05063 mol

2NI_3(s)\rightarrow N_2(g)+3I_2(g), \Delta H_{rxn}=-290.0 kJ

According to reaction, 2 moles of nitrogen triiodide gives 290.0 kilo Joules of heat on decomposition ,then 0.05063 moles of nitrogen triiodide will give :

\frac{-290.0 kJ}{2}\times 0.05063=-7.34 kJ

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