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Leno4ka [110]
3 years ago
13

Arrange the substances in order of the increasing volatility. H20 , NH3, HF. Explain the answer. Anyway what is volatility?​

Chemistry
1 answer:
Vinvika [58]3 years ago
8 0

Answer:

volatility means liability to change rapidly and unpredictably, especially for the worse

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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

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

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3 years ago
Give two reasons why people should use petrochemicals wisely.
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I. Because they're a limited resource

2 Because they're a cause of carbon pollution.
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A student put together the experimental setup shown below. The selectively permeable membrane is permeable to water, but not the
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The correct answer to this question is Water will move from left to right.

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Diamond has a density of 3.513 g/cm³. The mass of diamonds is often measured in "carats," where 1 carat equals 0.200
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The volume of a 1.86-carat diamond in cubic centimeters is 0.106 cm³

Given,

The density of a diamond is  3.513 g/cm³.

We have to find out the volume of a 1.86-carat diamond in cubic centimeters.

Convert the units of the diamond from carat to grams, we have:

(1.86 carats) x (0.200 g / 1 carat) = 0.372 g

The volume of the diamond is obtained by dividing the mass by the density, therefore using the formula, we get

                            v = m / d

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Therefore, the volume of a 1.86-carat diamond is approximately 0.106 cm³.

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