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3 years ago

Which example is not a kind of symbiosis? A. estivation B. commensalism C. parasitism D. mutualism

Chemistry

2 answers:

aliya0001 [1]3 years ago

4 0

Your answer is estivation.

7nadin3 [17]3 years ago

4 0

Answer:

C. parasitism

Explanation:

Symbiosis is an interspecific ecological interaction, that is, between organisms of different species, occurring in a compulsory and harmonious manner, allowing reciprocal advantages for the species involved. This association is permanent, causing dependence indispensable to the survival of the parties, and can no longer detach from each other, due to the collaboration that each exerts on the metabolism of its dependent, probably harmful if they were separated.

Parasitism is an association between two organisms, but it is the type of association that does not promote benefits to both living organisms, on the contrary, in parasitism an organism causes a malfunction in the body of another organism, but its development is favored. For this reason, parasitism cannot be considered a kind of symbiosis.

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Why is it that no two elements have the exact same emission spectrum?

jonny [76]

Answer:

When atoms are excited they emit light of certain wavelengths which correspond to different colors. Each element produces a unique set of spectral lines. Since no two elements emit the same spectral lines, elements can be identified by their line spectrum.

Explanation:

5 0

3 years ago

Could someone please care to explain what the answer is

polet [3.4K]

Calculate the percentage composition of Ca(MnO4)2.

<u>Firstly, we see how many atoms are there for each element in the formula</u>.

Ca= 1 atom

Mn= 2 atoms

O= 8 atoms

<u>Next, we are going to consult our periodic table for the atomic mass of each element.</u>

Ca= 40

Mn= 55

O= 16

Then, we have to find the molar mass for the compound..

Here is the formula for calculating molar mass of an element:

Molar Mass= ( no. of atoms of the element × atomic mass of the element)

Now, we have to calculate the atomic mass of the compound. So using the molar mass formula for an element, we calculate the molar mass for each element then we sum up their molar masses to get the compounds molar mass.

Molar mass (Ca)= 1× 40

(Ca)= 40

Molar mass (Mn)=2×55

(Mn)= 110

Molar mass (O)= 8×16

(O)= 128

Now: Molar mass( compound)= (Ca)+(Mn)+(O)

= 40+ 110 128

= 278

This is everything we need to calculate our percentage composition for each element..

* The example says to find the percentage composition for Ca. So we only find for Ca, Which is already done using the formula and the answer is 14.39%.

To prove that your answer is correct, find the percentage composition for Mn and O as well. Then you add up their percentage compositions.

If you do and you get 100 as your answer, then your percentage compositions are correct.

Why don't you try finding the percentage composition for Mn and O, then add up all the three percentage compositions. If you 100 as their sum, then your percentage composition for each of the elements are correct.

6 0

3 years ago

Purification of chromium can be achieved by electrorefining chromium from an impure chromium anode onto a pure chromium cathode

miskamm [114]

Answer:

544.522 Hours

Explanation:

a) Mass = 12.5 kg = 12500 g

Now, Number of moles is given as

No of moles = Mass of Cr / Molar mass of Cr

$=\frac{12500}{52}$

= 240.38 moles

$Cr^{3+}\Rightarrow$ 3 mols of electrons are required

$\Rightarrow 240.38\times3 =721.14\text{mol of e-}$

Converting moles of e- to coulombs of charge, (1 mol of electrons = 96500 C )

Q =721.14 mol×96500 C/mol

=69590010 of charge

We know that, Q = I×t

where Q is charge, I is current and t is time required.

$\Rightarrow t =\frac{Q}{I}$

$=\frac{69590010}{35.5}$

=196281.97 seconds

$=\frac{1.96281\times10^5}{3600}$

=544.522 Hours

3 0

3 years ago

For the endothermic reaction CaCO3 (s) ↔ CaO (s) + CO2 (g) Le Châtelier's principle predicts that ________ will result in an inc

Lunna [17]

Answer:

increasing the temperature

Explanation:

Le Châtelier's principle for an endothermic reaction states that when a stress is added on the system it causes the stress to shift to the direction where the stress can be reduced in other for equilibrium can be achieved.in this case an increase in temperature results in the increase in number of moles of carbon dioxide

6 0

3 years ago

An element has atomic number 10 and an atomic mass of 20. How many neutrons are in the atom of this electron

ArbitrLikvidat [17]

Answer:

10 Neutrons

Explanation:

Atomic Mass = # of Protons + # of Neutrons

Atomic Number = # of Protons in nucleus and what element

20 = 10 protons + x # of neutrons

10 = x # of protons

3 0

4 years ago

Read 2 more answers