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2 years ago

When a hot dog is cooked, is that a physical change or chemical change

Chemistry

2 answers:

Mashutka [201]2 years ago

7 0

a chemical change hope I helped you!!!! :-D :-D :-D :-D :-D

kifflom [539]2 years ago

4 0

Its a Chemical change

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Salt dissolved in water is a solution, therefore _____.

saveliy_v [14]

Answer: Correct options are as follows.

salt is not chemically bonded to water.

salt and water retain their own chemical properties.

Explanation:

When salt is dissolved in water then it means that it is a physical change as salt has completely dissociated into ions but they are not chemically combined to the water molecules.

As a result, both salt and water will retain their chemical properties.

For example, NaCl when dissolved in water will dissociate as follows.

$NaCl \rightarrow Na^{+} + Cl^{-}$

Only the particles of salt have evenly distributed in water.

And, when a components of a salt chemically combine with another substance then it will form a new compound.

Therefore, we can conclude that salt dissolved in water is a solution, therefore:

salt is not chemically bonded to water.

salt and water retain their own chemical properties.

4 0

2 years ago

What are intensive properties of a triangle

Ivan

A triangle has three sides, three vertices, and three angles. The sum of the three interior angles of a triangle is always 180°. The sum of the length of two sides of a triangle is always greater than the length of the third side.

7 0

2 years ago

4 Elliot has some stearic acid. It is in the solid state.

Ahat [919]

Answer:

it is in solid state

Explanation:

at 100% heat

6 0

2 years ago

Arrange the molecules H2O, NH3, Ar, NaCl in order of expected increasing boiling points. 1. None of these 2. NaCl, H2O, NH3, Ar

Aleks04 [339]

Answer:

Option (4) is correct

Explanation:

NaCl is an ionic solid. $Na^{+}$ and $Cl^{-}$ ions are held together by strong coloumbic attractive force. Hence NaCl has highest boiling point'
Ar is a monoatomic molecule. Hence only weak london dispersion force exists between Ar atom/molecules. Hence it requires lowest amount of energy to boil and thereby possess lowest boiling point.
$NH_{3}$ and $H_{2}O$ are polar protic molecules. Hence they possess london dispersion force, dipole-dipole force and hydrogen bonding as intermolecular forces.
Dipole-dipole force is stronger in $H_{2}O$ than $NH_{3}$ due to more polar O-H bond than N-H bond. Also molecular weight of $H_{2}O$ is higher than $NH_{3}$ . So, more energy is required to boil $H_{2}O$ . So, $H_{2}O$ has higher boiling point than $NH_{3}$

Hence order of boiling point : $NaCl>H_{2}O>NH_{3}>Ar$

4 0

2 years ago

The combustion of alkanes, alkenes and alkynes produces:

algol [13]

Alkanes, alkenes, and alkynes are compounds containing only carbon and hydrogen. When these compounds undergo complete combustion, the products are carbon dioxide and water. Otherwise, when incomplete combustion occurs, carbon dioxide, water, and carbon monoxide are produced. Note that carbon monoxide is a toxic gas that is harmful to people's health.

7 0

2 years ago