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2 years ago

Essential life materials, like nitrogen and carbon, are exchanged and recycled through _____.

Chemistry

2 answers:

Scorpion4ik [409]2 years ago

6 0

Answer:

Biogeochemical Cycles.

Explanation:

In Earth Science and ecology, a biogeochemical cycle or cycling of substances refers to a pathway by which a chemical component mediates via biosphere (biotic) and lithosphere, atmosphere, and hydrosphere (abiotic) constituents of the Earth.

There are biogeochemical cycles for the chemical elements carbon, mercury, calcium, hydrogen, phosphorus, nitrogen, sulfur, selenium, and oxygen. The important life constituents, like carbon and nitrogen, are recycled and exchanged via biogeochemical cycles.

SpyIntel [72]2 years ago

5 0

The answer is A, biogeochemical cycles.

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A scientist discovers a new type of polymer. What must be true about this polymer?

mixas84 [53]

Answer: Option (D) is the correct answer.

Explanation:

A polymer is a large molecule which contains repeating units.

A polymer forms long chain of atoms which are not necessarily arranged in a ring structure. There are not only double bonds between all the carbon atoms, as there can be single bonds or triple bonds between the atoms of a polymer.

A polymer does not contain many different type of molecules as there are many repeating units and not many molecules in a polymer.

A polymer is made of large molecules with repeating units.

Thus, we can conclude that option (D) is the correct answer.

5 0

3 years ago

What type of reaction is sodium reacting with chlorine

Ksenya-84 [330]

Answer:

combination reaction

Explanation:

i'm not sure i just searched it on the internet

8 0

3 years ago

Read 2 more answers

Consider the reaction for the decomposition of hydrogen disulfide: 2H2S(g)⇌2H2(g)+S2(g), Kc = 1.67×10−7 at 800∘C A 0.500 L react

trasher [3.6K]

Answer:

Molar concentration of S₂ is 1.77×10⁻⁶M

Explanation:

For the reaction:

2H₂S(g) ⇄ 2H₂(g) + S₂(g)

The equilibirum constant, K, is defined as:

$K = \frac{[S_2][H_2]^2}{[H_2S]^2}$ (1)

Concentrations in equilibirum are:

[H₂S] : 0,163/0.500L - X

[H₂] : 0,0500/0.500L + X

[S₂] : X

Replacing the concentrations and the equilibrium value in (1):

$K = \frac{[X][0.1+X]^2}{[0326-X]^2}$

1.67x10⁻⁷ = X (X² + 0.2X + 0.01) / (X² -0.652X + 0.106)

1.67x10⁻⁷X² - 1.09x10⁻⁷X + 1.77x10⁻⁸ = X³ + 0.2X² + 0.01X

0 = X³ + 0.2X² + 0.01X - 1.77x10⁻⁸

Solving for X:

X = 1.77×10⁻⁶

As [S₂] = X, molar concentration of S₂ is 1.77×10⁻⁶M

I hope it helps!

5 0

3 years ago

bogdanovich [222]

Answer:

2 and 4

Explanation:

4 0

3 years ago

Please help! Calculate the percent by mass of water in FeCl2 · 4H20.

Sedaia [141]

Answer:

36.23 %

Explanation:

Let's assume we have 1 mol of FeCl₂ · 4H₂O. In that case we would have:

1 mol of FeCl₂, weighing 126.75 g (that's the molar mass of FeCl₂), and

4 moles of H₂O, weighing (4 * 18 g/mol) 72 g.

Now we can calculate the percent by mass of water:

% mass = mass of water / total mass * 100%

% mass = $\frac{72}{72+126.75}$ * 100% = 36.23 %

5 0

2 years ago