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3 years ago

What is the difference between a crystalline material and an amorphous material? Give an example of each type.

Chemistry

1 answer:

Igoryamba3 years ago

7 0

Answer :

As we know that there are two types of solids.

(1) Amorphous Solids

(2) Crystalline Solids

Amorphous Solids : It is a type of solids in which the constituent particles of the matter are arranged in the random manner.

That means there is no proper arrangement of atoms in solid lattice but the atoms or molecules are closely spaced that means they can move freely from one place to another.

The examples of amorphous solid are, plastics, glass, rubber, metallic glass, polymers, gel, fused silica, pitch tar, thin film lubricants, wax.

Crystalline Solids : It is a type of solids where the constituent particles of the matter are arranged in the specific manner.

That means there is a proper arrangement of atoms in solid lattice. They do not have space between the molecules or atoms and they can not move freely from one place to another.

The examples of crystalline solids are, quartz, calcite, sugar, mica, diamonds, snowflakes, rock, calcium fluoride, silicon dioxide, alum.

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Part A

abruzzese [7]

117 mL of 0.210 M K₂S solution

Explanation:

The question asks about the volume of 0.210 M K₂S (potassium sulfide) solution required to completely react with 175 mL of 0.140 M Co(NO₃)₂ (cobalt(II) nitrate).

We have the chemical reaction:

K₂S + Co(NO₃)₂ → CoS + 2 KNO₃

molar concentration = number of moles / volume (L)

number of moles = molar concentration × volume

number of moles of Co(NO₃)₂ = 0.140 × 175 = 24.5 mmoles

We see from the chemical reaction that 1 mmole of Co(NO₃)₂ is reacting with 1 mmole of K₂S, so 24.5 mmoles of Co(NO₃)₂ are reacting with 24.5 mmoles of K₂S.

volume = number of moles / molar concentration

volume of K₂S solution = 24.5 / 0.210 = 117 mL

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molar concentration

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6 0

3 years ago

a balloon has a volume of 1.2 liters inside a room where the temperature is 25°C.What is the volume of this balloon when it is t

sashaice [31]

Answer:

1.04 L

Explanation:

Charles law states that for a fixed mass of gas, volume of gas is directly proportional to the absolute temperature at constant pressure.

$\frac{V1}{T1} = \frac{V2}{T2}$

where V1 is the volume and T1 is absolute temperature at first instance

and V2 is volume and T2 is absolute temperature at the second instance

Absolute temperature is temperature in the kelvin scale

T1 - 25 °C + 273 = 298 K

T2 - -15 °C + 273 = 258 K

substituting the values in the equation

$\frac{1.2 L}{298K} = \frac{V2}{258K}$

V2 = 1.04 L

when the temperature is -15 °C the volume is 1.04 L

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4 years ago

If you were looking for transport proteins, where would you find them?

noname [10]

Answer:Transport proteins are found within the membrane itself, where they form a channel, or a carrying mechanism, to allow their substrate to pass from one side to the other.

Explanation:

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3 years ago

Why is air humid and weather wet at low pressure belts

natima [27]

In low-pressure belts, there is an absence of surface winds because winds approaching them rise near their margin. This causes vertical currents. when they pass along the ocean, they suck up a lot of water and get a lot of moisture, thus giving wet and humid weather.

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4 years ago

Name the following compound:

Tems11 [23]

Answer:

The answer is 1-butene

Explanation:

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4 years ago