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3 years ago

Obsidian is formed when rapidly cooling ions are randomly distributed, creating a _____ texture. wikianswers

Chemistry

2 answers:

Serhud [2]3 years ago

7 0

Answer:

The correct answer is glassy.

Explanation:

Obsidian, or also known as volcanic glass, is a type of igneous rock (volcanic rock belonging to the silicates), formed by aluminum silicates and a large percentage of silicic oxides.

The obsidian is formed when a volcano emerges lava that cools quickly, which has a minimum growth of crystals. In the flows where it is obtained, the high silica oxide content induces a high viscosity and degree of polymerization of the lava. The inhibition of atomic diffusion in this highly viscous and polymerized lava explains the lack of crystal growth, giving shape to the glassy texture.

Have a nice day!

tangare [24]3 years ago

4 0

Creates a glassy texture.

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Heat required = Q = 40 kcal

<h3>Further explanation</h3>

Given

mass of 500 g ice

Required

Heat required

Solution

The heat to change the phase can be formulated :

Q = m.Lf (melting/freezing)
Q = m.Lv (vaporization/condensation)

Lf=latent heat of fusion

Lv=latent heat of vaporization

Lf for water = 334 kj/kg=6.01 kJ/mol = 80 cal/g

Phase change(ice to water)

Q= 500 g x 80 cal/g

Q = 40 kcal

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Answer:

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What would be the greatest difference in using an open ceramic coffee mug rather than an insulated mug with a lid as a calorimet

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Answer:

Hi. Increased evaporation would be the greatest difference.

Explanation:

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How is the structure of the atom arranged?

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Answer:

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3 years ago

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Answer:

1.18 × 10⁷ c

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Explanation:

Let's consider the reduction of Zn²⁺.

Zn²⁺(aq) + 2 e⁻ ⇒ Zn(s)

<em>How many coulombs of charge are needed to produce 61.2 mol of solid zinc?</em>

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We can establish the following relations:

When 2 moles of electrons circulate, 1 mol of Zn is produced.
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<em>Identify the anode and cathode when plating an iron nail with zinc.</em>

The anode is where the oxidation takes place and the cathode is where the reduction takes place.

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Cathode (reduction): Zn²⁺(aq) + 2 e⁻ ⇒ Zn(s)

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