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Nina [5.8K]
2 years ago
6

A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later,

the molecules move around each other. What change did the scientist observe in the substance?
Chemistry
2 answers:
Vera_Pavlovna [14]2 years ago
5 0

Answer:

Base on the properties the substances possess the substance change phase from gas to liquid.

Explanation:

Generally, matter can exist in three phase namely liquid , solid and gas. The scientist has a container with a substance inside.

At first the substance moves away from each other . This means the substance was first in the gas phase . Gas molecules, because of the energy they possess , it can move rapidly and randomly and most at times move away from each other . The gas molecules tends to fill the whole volume of the container and the shape of gases are indefinite.

Later the molecules move around each other. This is a property of a liquid . A substance in liquid phase have the ability to move freely but they stay together because of the force of attraction holding them together . The substance only have the ability to move around each other because the forces holding them together won't allow them to move apart.

Base on the properties the substances possess the substance change phase from gas to liquid.

Sedbober [7]2 years ago
3 0

Answer:

The observed change is simple.

When a substance such as water is in gaseous form, its molecules move away from one another, however, when it begins to solidify (sometimes) first into liquid then into Ice (which is solid). At this point the molecules have become closer and around one another.

Increasing heat can make a solid like ice to melt to form water (a liquid). Reducing the heat on the other hand  causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. Even though the water's physical form changes, its molecules remain the same.

Cheers!

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n a combination redox reaction, two or more ____________ , at least one of which is a(n) ____________ , form a(n) ____________ .
Anna [14]

Answer:

In a combination redox reaction, two or more reactants, at least one of which is a(n) element, form a(n) compound. General Reaction: X + Y > Z

In a decomposition redox reaction, a(n) compound forms two or more products, at least one of which is a(n) element. General Reaction: Z>X+Y

In double-displacement (metathesis) reactions, such as precipitation and acid-base reactions, atoms (or ions) of two compounds exchange places; these reactions are not redox processes. General Reaction: AB+CD>AD+CB

In solution, single-displacement reactions occur when a(n) atom of one element displaces the atom of another. Since one of the reactants is a(n) element, all single-displacement reactions are redox processes. General Reaction: X+YZ>XY+Z

Explanation:

In a combination redox reaction, two or more reactants, at least one of which is a(n) element, form a(n) compound.

General Reaction: X + Y > Z

In the reaction scheme above, X combines with Y to give Z as a product.

In a decomposition redox reaction, a(n) compound forms two or more products, at least one of which is a(n) element.

General Reaction: Z>X+Y

In the reaction scheme above, Z decomposes to X and Y

In double-displacement (metathesis) reactions, such as precipitation and acid-base reactions, atoms (or ions) of two compounds exchange places; these reactions are not redox processes since there are no changes occurring in the oxidation number of the atoms (or ions) involved.

General Reaction: AB+CD>AD+CB

In the reaction scheme above, B and D exchange places in their respective compounds

In solution, single-displacement reactions occur when a(n) atom of one element displaces the atom of another. This type of reaction is due to the difference in the reactivities of the elements. The more reactive atom of one element displaces the least reactive atom of another element from its solution.

Since one of the reactants is a(n) element, all single-displacement reactions are redox processes.

General Reaction: X+YZ>XY+Z

In the reaction scheme above, X displaces Z from the compound YZ.

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6 0
3 years ago
Calculate the density of a material that has a mass of 56.6 g and a volume of 17.2 cm
Cerrena [4.2K]

Answer:

d = 3.29 g/cm³

Explanation:

Given data:

Density of material = ?

Mass of material = 56.6 g

Volume of material = 17.2 cm³

Solution:

Formula;

d = m/v

d = density

m = mass

v = volume

by putting values,

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4 0
2 years ago
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Step2247 [10]

Answer:

amu = 42.02

Explanation:

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7 0
3 years ago
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elena-14-01-66 [18.8K]
<h3>Hi!</h3>

<h3>The correct options would be:</h3>

1, 3 and 4.

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In gamma decay, the atom releases energy spontaneously to stabilize itself, and this energy is released in the form of photons.

<h3>Hope this helps!</h3>
5 0
3 years ago
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