CHEMISTRY HIGH SCHOOL

The freezing point of bromine is
(1) 539°C (3) 7°C(2) –539°C (4) –7°C

Answers

Answer 1
Answer:

The freezing point of bromine is –7°C. Therefore, the correct option is option D among all the given options.

What is bromine?

Bromine (Br) is a chemical substance, a deep red toxic liquid, and a member of Group 17 (Group VII) of both the periodic chart. At room temperature, free bromine seems to be a reddish brown fluid with such a significant vapour pressure.

Bromine vapour has an amber color. Bromine has a strong odor and can irritate the skin, eyes, especially respiratory system. Even brief exposure to intense bromine vapour can be lethal. The freezing point of bromine is –7°C.

Therefore, the correct option is option D.

To learn more about bromine, here:

brainly.com/question/1952132

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Answer 2
Answer: The freezing point of bromine is (4) -7 degrees Celsius.
Hope this helps~

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When you strike a match, you produce frictional heat energy. What does this input of energy represent in a chemical reaction?A.the energy of the reactants
B.the energy of the products
c.the energy of activated complex
d.the energy of activation

Answers

The correct answer is D.  The energy needed for a chemical reaction is called the activation energy. This energy is to be present in order for the reaction to happen. This can be achieved by supplying or releasing heat from a system of reactants. This can achieved faster by using a catalyst.

Why did the identity of the water not change when it formed ice? assroo.

Answers

It didn't change because nothing but the temperature to make it freeze went into it so it is still the same substance. Hope this helped!

When was Carbon discovered? (The element from the periodic table)

Answers

Carbon was discovered in 3750 BC

A chemical reaction in which compounds break up into simpler constituents is a _______ reaction. A. double replacement
B. substitution
C. decomposition
D. combination

Answers

C) Decomposition. Double replacement would be AB + CD = AD + BC, substitution is AB + C = CB + A, and combination is A + B = AB

Describe the sequence of events in the formation of an evaporite

Answers

- Water enter from creeks, bringing whatever material it has dissolved in its way

- The materials is being build up throughout time in the lake or sea, causing its salinity to increase

- when this saline solution is evaporated, the ions in the water precipitate, forming an evaporite

Sediments are buried, pressure increases, volume of sediment decreases, sandstone compresses, saline solution becomes evaporated,and thenforms an evaporite.

What is an evaporite?

An evaporite can be defined as a mineral deposit containing saline substances that are produced due to the evaporation of a water body.

In this context, the sequence of events in the formation of an evaporite are listed as follows:

  1. Sediments are buried.
  2. Increase pressure pushes the grains closer together.
  3. Decrease in the volume of sediment, which cause fluids between the grains to be squeezed out.
  4. Sandstone are left tightly compressed together.
  5. The saline solution becomes evaporated, and then the ions contained in the water precipitates, forming an evaporite.

Read more on evaporite here: brainly.com/question/506772

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Consider this equilibrium:CO2(g) + 2H2O(g) CH4(g) + 2O2(g).

What indicates that the reactants are favored?

Keq is zero.
Keq is very large.
Keq is slightly less than 1.
Keq is slightly greater than 1.

Answers

The equilibrium constant is a value which represents the equilibrium of a reaction. It is a reaction quotient when the reaction reached equilibrium. If Keq is greater than 1, the mixture contains mostly the products. On the other hand, if Keq is less than 1, the mixture contains the reactants. Therefore, the answer is the second option, Keq is very large.
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