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likoan [24]
3 years ago
7

Obsidian is a volcanic glass that forms when lava cools very quickly and consists of a solid mass of glass through and through.

Why is obsidian not classified as a mineral? Choose one: Obsidian is not naturally occurring since it is only associated with volcanoes. Obsidian does not have a definable chemical composition because it only comes from lava. Obsidian contains carbon-to-hydrogen bonds. The atoms or molecules in obsidian do not have a crystalline structure.
Chemistry
1 answer:
Alecsey [184]3 years ago
6 0

Answer:

Obsidian is not a mineral as the atoms or molecules in obsidian do not have a crystalline structure.

Explanation:

Obsidian originates naturally and is formed by igneous rock.

When felsic larva comes out from the volcano,it rapidly cools down and thus form obsidian.It is pure black in color but some times color differ due to presence of some impurities.

It is brittle,but hard.It is not a mineral and is called as mineraloids and is not found in crystalline form,.

The main constituent is SiO2.

It is found in the margin of rhyolitic lava.

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4. A 14.5-L balloon is in the air where it is 20.0 C at 0.980-atm. A wind passes over and the balloon's pressure becomes 740.0-m
jeka94

The temperature of the wind as that decreases the volume and the pressure of the balloon to the given values is 14.09°C.

<h3>What is Combined gas law?</h3>

Combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

  • Initial volume V₁ = 14.5L
  • Initial pressure P₁ = 0.980atm
  • Initial temperature T₁ = 20.0°C = 293.15K
  • Final volume V₂ = 14.3L
  • Final pressure P₂ = 740.mmHg = 0.973684atm
  • Final temperature T₂ = ?

We substitute our given values into the expression above.

P₁V₁/T₁ = P₂V₂/T₂

( 0.980atm × 14.5L )/293.15K = ( 0.973684atm × 14.3L )/T₂

14.21Latm / 293.15K = 13.92368Latm / T₂

14.21Latm × T₂ = 13.92368Latm × 293.15K

14.21Latm × T₂ = 4081.72679LatmK

T₂ = 4081.72679LatmK / 14.21Latm

T₂ = 287.24K

T₂ = 14.09°C

Therefore, the temperature of the wind as that decreases the volume and the pressure of the balloon to the given values is 14.09°C.

Learn more about the combined gas law here: brainly.com/question/25944795

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Please help me the picture is above.
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A

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bc inorganic compoud refers to all compound that do not contain carbons.

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