1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Licemer1 [7]
3 years ago
11

8.Which arrow or arrows represent a release of carbon dioxide? What process is occurring at the arrow(s) you selected? 9. Which

arrow or arrows indicate a process that cycles carbon from living or nonliving organisms? Describe the process or processes you selected. 10. Which arrow or arrows represent reactions that demonstrate a conservation of mass and energy? Explain your answer.

Chemistry
1 answer:
arsen [322]3 years ago
8 0

Answer:

plant respiration shows arrows where CO2 is released.the arrow is going out of the trees represent the release of carbon dioxide.the arrows from the factories,clouds,water shows the circulation of carbon.

You might be interested in
The strength of a covalent bond depends upon the size of the atoms and the bond order. In general short bonds are strong bonds.1
Oksana_A [137]

Answer:

<u>Bond energy of</u> (A) C≡C > (B) C=C

<u>and, </u>(C) C=N > (D) C-N

Explanation:

Bond energy refers to the amount of energy required to break a bond or the energy released when a bond is formed. Bond energy of a covalent bond suggests the bond strength of the chemical bond and depends on the <u>bond length and bond order of the chemical bond. </u>

<u>The bond energy of a chemical bond increases with the bond order and decreases with the bond length</u>. As, length of a bond decreases with increase in the bond order.

First pair: (A) C≡C (B) C=C

The bond order of C≡C - 3, the bond order of C=C - 2

Since the bond order: C≡C > C=C

Bond length: C≡C < C=C

<u>Therefore, bond energy of (A) C≡C > (B) C=C</u>

Second pair: (C) C=N (D) C-N

The bond order of C=N - 2, the bond order of C-N - 1

Since the bond order: C=N > C-N

Bond length: C=N < C-N

<u>Therefore, bond energy of (C) C=N > (D) C-N</u>

8 0
3 years ago
These models show the electron structures of two different nonmetal elements.
Soloha48 [4]

Answer: Option (D) is the correct answer.

Explanation:

Valence shell is the shell present on the outermost core of an atom and electrons present in the valence shell are known as valence electrons.

If an atom has completely filled valence shell then it means the atom is not reactive in nature because it is already stable.

But when an atom has less than eight electrons in its valence shell then it means to attain stability the atom will readily attract electrons towards itself.

As the given element 1 has 8 electrons in its valence shell. Hence, it is not reactive in nature but element 2 has 6 valence electrons. So, in order to attain stability element 2 will readily attract 2 electrons from a donor atom.

Thus, we can conclude that element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

4 0
3 years ago
A pure substance that contains more than one atom is called a(n)...
gladu [14]

<u><em>Answer:</em></u>

  • A pure substance that contains more than one atom is called a compound.

<u><em>Explanation:</em></u>

  • Compounds are formed by combination of atoms by a fixed ratio. They have their own characteristic features.
  • Pure substances are further broken down into elements and compounds. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.

<u><em>Example </em></u>

  • H2SO4 which  is formed by combination of three different atoms like H, S and O.
6 0
2 years ago
Read 2 more answers
Which of the following polyatomic ions will form an ionic compound with a single sodium ion? CO32− PO43− SO42− NO31−
Artist 52 [7]

A single sodium ion will combine due to its charge on it

Na^+

The single sodium ion has total one positive charge on it. so it requires only one electron or can bond to one negative charge

in the given polyatomic anions

a) CO3^-2 : it has two negative charge. So it will react with two sodium ions

it will forms Na2CO3

b) PO4^-3 :it has three negative charge. So it will react with three sodium ions

it will forms Na3PO4

c) SO4^-2 : it has two negative charge. So it will react with two sodium ions

it will forms Na2SO4

d) NO3^-1: it has one negative charge. So it will react with one sodium ion

it will forms NaNO3

Hence the correct answer is

Nitrate ion will react with single sodium ion as

Na+   + NO3-  ---> NaNO3

4 0
3 years ago
"a gaseous mixture contains 414.0 torr of h2(g), 345.7 torr of n2(g), and 80.1 torr of ar(g). calculate the mole fraction, x, of
DENIUS [597]
<span>The gaseous mixture contains 414.0 torr of h2(g), 345.7 torr of n2(g), and 80.1 torr of ar(g). Then, total pressure of the gas would be: 414 torr + 345.7 torr + 80.1 torr= 839.8 torr
The mole fraction of each gas:
H2= 414 torr/</span>839.8 torr= 0.49
N2= 345.7 torr/839.8 torr= 0.41
Ar= 80.1 torr/839.8 torr= 0.10

7 0
3 years ago
Other questions:
  • Which book has kinetic energy
    9·1 answer
  • A big league hitter attacks a fastball!! The ball has a mass of 0.16 kg it is pitched at 38 m/s after the player hit the ball it
    9·1 answer
  • Can someone tell me if I put this in the correct pairs???? Help please!!??
    10·1 answer
  • The temperature of the gas
    8·1 answer
  • You have two 466.0 mL aqueous solutions. Solution A is a solution of silver nitrate, and solution B is a solution of potassium c
    9·1 answer
  • 67.3 inches to meters
    15·2 answers
  • Craig needs to organize, analyze, and interpret large amounts of quantitative data that he generated during an experiment. Which
    13·1 answer
  • How many mols of H3PO4 are produced when 284 g P4O10 reacts completely to form H3PO4? P4O10 + 6H2O --&gt; 4H3PO4
    12·1 answer
  • How do lone pairs of electrons influence the structure of molecules
    14·1 answer
  • Chemical molecules that impart positional information through their concentration gradient are called
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!