CHEMISTRY HIGH SCHOOL

What would happen to the size of the herbivore population if the producer population decreased?decrease
double in number
stay the same
triple in number

Answers

Answer 1
Answer:

The size of the herbivore population is decreased if the producer population decreased. Therefore, option A is correct.

What would happen if the population of herbivores increases?

Large population of herbivores will overgraze. Therefore, all plants will vanish from the earth surface and ultimately the earth may become a desert.

Producers are organisms that produce their own food via a process known as photosynthesis, such as plants. Herbivores are organisms that eat producers. Herbivores include rabbits, giraffes, and other animals.

An increase in producer population corresponds to an increase in herbivore population, whereas a decrease in producer population corresponds to a decrease in herbivore population.

Thus, If the size of the producer population decreases, so will the size of the herbivore population.

To learn more about the herbivore population, follow the link;

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Answer 2
Answer:

Answer;

-Decrease

if the producer population decreased then the size of the herbivore population will consequently decrease.

Explanation;

Producersare organisms that make make their own food through a process known as photosynthesis, e.g. plants such as grasses. Herbivores are the organisms which feed on producers. Examples of herbivores are rabbits, giraffes etc.

-An increase in producer population means that there will be a a corresponding increase in the population of herbivores while a decrease in the size of producers will cause a decrease in the population of herbivores.

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Over-encouraging lesser skilled players can lead to embarrassment.
a. True
b. False

Answers

Answer: Option (a) is correct.

Explanation:

A person with less skills needs to work more or practice more on his abilities in order to improve their athletic ability to build a stronger team.

Over encouragement to lesser skilled person can lead to the development of over confidence. As after over encouragement, the less skilled person can have the illusion of knowing each and everything which is not true for anyone.

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My answer would be a. True

At constant volume, if the Kelvin temperature of a gas is doubled, the pressure of the gas is halved.A. True
B. False

Answers

False
I got this question right on the test

Answer:

False

Explanation:

Because if Kelvin temperature gas is doubled, the pressure would not change

Does overcrowding affect an organisms growth?

Answers

Most definitely! Consider bacteria in a petri dish. Organisms need nutrition to survive, and when overcrowding is an issue (which by definition means that there is an insufficient amount of space/resources for the current population), organisms cannot survive and reproduce.

Hydrogen peroxide can be prepared by the reaction of barium peroxide with sulfuric acid according to

Answers

Answer:

31.43 ml of sulfuric acid is needed to react with 23.1 g of barium peroxide.

Explanation:

For the reaction:

BaO₂(s) + H₂SO₄(aq) ⇒ BaSO₄(s) + H₂O₂(aq)

We need 1 mole of BaO₂ to react with 1 mole of H₂SO₄ and then forming 1 mole of BaSO₄ and 1 mole of H₂O₂.

We know that 4.5 M solution of H₂SO₄ means 4.5 moles of H₂SO₄ in 1000 ml of solution.

Then,

23.1 g BaO₂ × (1 mole_(BaO_2))/(163.33g_(BaO_2)) ×   \frac{1 mole_{H_(2)SO_(4)}}{1mole_(BaO_2)} ×   \frac{1000ml}{4.5 mole_{H_(2)SO_(4)}} = 31.43 ml H₂SO₄
BaO₂ + H₂SO₄ ⇒ BaSO₄ + H₂O₂
169g   :  98g
23.1g  :  mx

mx = [23.1*98g]/169g ≈ 13.4g
Mr = 98g/mol 

n = 13.4g/98g/mol ≈ 0.14mol

Cm = 4.5M
n = 0.14mol

V = 0.14mol/4.5mol/dm³ ≈ 0.031L = 31mL

When a substance dissolves, it undergoes a chemical change.
a. True
b. False

Answers


False.

Solubility is not a chemical property but rather it is a physical property. A physical property is one that can be observed or measured and does not change the composition or identity of a substance in the process.

When a substances dissolves, this is a change of its physical state and it is mostly reversible.  For example, salt can dissolve in water to form a solution called brine. This does not alter the chemical nature of salt. When the water evaporates, salt is left behind in its original state or form. In other words, that was a physical change and it was completely reversible.

According to the periodic table, which statement correctly describes the change from a neutral atom of an element to its ion?

Answers

According to the periodic table, a sodium atom forms Na^+^1 ion by losing two electrons correctly describes the change from a neutral atom of an element to its ion.

What is a neutral atom?

A neutral atom is an atom where the charges of the electrons and the protons balance.

Atomic number 11.

Mass number 23.

Na Electron arrangement 2, 8 , 1 Will lose 1 electron to gain a full valence shell.

Since now 11 + and 10 –, the overall charge is 1+ So we write Na^+^1 or simply Na^+.

Learn more about the neutral atom here:

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A sodium atom forms Na1+ ion by losing two electrons
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