CHEMISTRY HIGH SCHOOL

Which of the following is true of coral?a.
It is located in deep sea regions.
b.
It supports few species.
c.
It is a large and complex organism.
d.
It is composed of thousands of individuals.

Answers

Answer 1
Answer: Coral is found close to shorelines and it can house many different types of organisms. The structures formed by colonies of coral are called reefs, the best example being the Great Barrier Reef in Australia. Coral is actually composed of the skeletons of dead coral. The coral excrete calcium carbonate, resulting in a hard structure which other organisms occupy. The answer is D.
Answer 2
Answer:

I know for a fact that the answer to this question is d; i just took the test & got it right. It's also the most logical response. Hope i helped!

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A liquid boils when its vapor pressure equals the pressure of the atmosphere.TRUE

FALSE

Answers

The answer is true. A liquid boils when its vapor pressure equals the pressure of the atmosphere. At this point, vapor can now readily escape from the liquid phase because it has an equal pressure now with its surrounding which, basically, is in the vapor phase.

Answer:

True

Explanation:

The boiling point of a liquid is the temperature at which the vapour pressure of the liquid equals the pressure of the surrounding atmosphere.

When a liquid is heated, the vapour pressure gradually increases till it matches the ambient pressure. Gas bubbles begin to form within the liquid, rise to the surface and then burst up to release gas. At this point, we say the liquid is boiling.

The lower the surrounding pressure, the lower the boiling point of a liquid and vice versa. Water boils at lower temperature in high altitudes because of lower pressure as compared to sea level.

Correct option: True.

Which list of phases of H2O is arranged in order of increasing entropy

Answers

The list of phases of H2O that is arranged in order of increasing entropy is from solid then liquid then gas. Gaseous water has the most entropy because of the random movement of water molecules. And Solid having the least entropy because the water molecules are arranged in a specific order.
  • i get this which list of phases of H2O is arranged in order of increasing entropy

An example of a decomposer is a:

rabbit
mushroom
tulip

Answers

Answer:

mushroom

Explanation:

In chemical equations, as long as all of the coefficients are the same on both sides of the equation, the equation is balanced.True
False

Answers

False. The subscripts have to be read and you must see if both sides have the same number of atoms.
This statement is false. Not only the coefficients must be balanced, the subscripts and also the number of elements must be equation on BOTH sides of the equation. That means that the reactants and products are equal, and unchanging. 

Calculate the molar mass
FeCl3
Fe2(SO4)3
PbO
PbO2
Pb3O4

Answers

To find molar mass: look for each element on the table and find their atomic masses. Then add each atomic mass to find the molar mass. If there is a subscript then that means that there is 3 of that number. For atomic mass round to the nearest hundredths
FeCl3= 162.2
Fe2(SO4)3= 354.88
PbO=223.2
PbO2 = 239.2
Pb3O4=685.6

What does it mean that valence electrons in a metal are delocalized?

Answers

Delocalized means that electrons in the metal are not linked only to a single atom or in a bond. Electrons are free to move and around the crystal structure and carry currents. This is why, in metals, there is a term "electron sea".

Answer:

A

Explanation:
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