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3 years ago

When gases are released from a reaction what type of change has occurred?

Chemistry

2 answers:

umka21 [38]3 years ago

3 0

Answer:

Color Changes. A change in color often indicates a chemical change.

Temperature Changes. Changes in temperature might also indicate a chemical change has occurred.

Precipitates. The formation of a precipitate is a sign that a chemical change has occurred.

Light Emission.

Gas Production.

Explanation:

Lesechka [4]3 years ago

3 0

<u>Answer:</u>

<em>A chemical change has occurred. </em>

<u>Explanation:</u>

A chemical change is accompanied by a change in the chemical composition of the substance.

A color change, formation of a precipitate, evolution of a gas , temperature change are the indications of a chemical change.

For example

$2AlCl_3 (aq)+3Na_2 CO_3 (aq)>Al_2 (CO_3 )_3 (s)+6NaCl(aq)$

Here we see the formation of a precipitate or an insoluble solid $Al_2(CO_3 )_3 (s)$

A chemical reaction is accompanied by a change in temperature.

Reaction in which heat is evolved is an exothermic reaction and reaction in which heat is absorbed is called as endothermic reaction.

Combustion reaction is an example in which heat and light is given off and it is exothermic.

Some reactions we see gas gets evolved. For example electrolysis of water produces Hydrogen and oxygen gas.

$2H_2O>2H_2+O_2$

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Kobotan [32]

$\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}$

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2 years ago

Traveling at the speed of light - how long would it take, in years, to reach the top of the pile of balls? Show all calculations

marusya05 [52]

The time taken for the object to reach to top of pile is 0.012 year.

<h3>Time of motion </h3>

The time taken for the object to reach to top of pile is calculated as follows;

time of motion = distance traveled/speed

time of motion = (1.1 x 10¹⁴ x 10³ m)/(3 x 10⁸ m/s)

where;

speed of light = 3 x 10⁸ m/s

time of motion = 3.67 x 10⁵ sec = 0.012 year

Thus, the time taken for the object to reach to top of pile is 0.012 year.

Learn more about time of motion here: brainly.com/question/2364404

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2 years ago

Which statement describes a scientific theory?

vichka [17]

Best Answer
C) is the best description, although a scientific theory is not necessarily a "fact". They are, however, based on evidence.

A) is complete garbage.

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D) is a scientific "hypothesis"- an explanation for an observed phenomena that is yet to be proven.

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Which is a positive effect of the technology advance of going from a compass to a gps

egoroff_w [7]

Answer:

Compass - Gps

Explanation:

I belive the pro's and cons are

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are going on and that it won't break or die

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west on the compass and if given no directions, extremely

you can see the roads follow directions confusing until you learn it

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3 years ago

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natka813 [3]

A would be correct have a nice day.

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3 years ago

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