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Ne4ueva [31]
4 years ago
11

I WILL GIVE THE BRAINLIEST

Chemistry
1 answer:
lubasha [3.4K]4 years ago
3 0

Ans 1. Both

Ans 2. Once inside plants, carbon moves through food chains, where organisms become nutrients including herbivores, carnivores and ultimately, decomposers. Once buried in the soil, carbon can be converted into fossil fuels over long periods of time and then also reenter the atmosphere by combustion. The Law of Conservation of Matter states that matter cannot be created or destroyed. The carbon cycle is an example of the Law

Ans 3. Most of the chemical energy needed for life is stored in organic compounds as bonds between carbon atoms and other atoms. The law of conservation of energy states that energy can not be created or destroyed. Thus, just like matter energy is also conserved in the process.

Hope it helps

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Can someone Help pls :)
s344n2d4d5 [400]

Answer:

D. I think

Explanation:

5 0
3 years ago
What would be the mass in grams of 8.94 x 10 22 formula units of copper(II) fluoride, CuF 2
Nadya [2.5K]

The mass in grams of 8.94×10²² formula units of CuF₂ is 15.07 g

<h3>Avogadro's hypothesis </h3>

6.02×10²³ formula units = 1 mole of CuF₂

But

1 mole of CuF₂ = 101.5 g

Thus,

6.02×10²³ formula units = 101.5 g of CuF₂

<h3>How to determine the mass of 8.94×10²² formula units of CuF₂</h3>

6.02×10²³ formula units = 101.5 g of CuF₂

Therefore,

8.94×10²² formula units = (8.94×10²² × 101.5 ) / 6.02×10²³

8.94×10²² formula units = 15.07 g of CuF₂

Thus, 8.94×10²² formula units are present in 15.07 g of CuF₂

Learn more about Avogadro's number:

brainly.com/question/26141731

#SPJ1

5 0
2 years ago
Sodium chloride appearance and state at 25°?​
gogolik [260]

Answer:

Physical properties: Sodium chloride is a white crystalline solid with a density of 2.16 g/mL, and a melting point of 801 °C. It is also available as aqueous solutions of different concentrations, called saline solutions. Chemical properties: Sodium chloride is readily soluble in water and other polar solvents.

Explanation:

<em>Hope </em><em>it </em><em>helps </em><em>ya </em><em>ItzAlex</em>

8 0
3 years ago
I need for a test and explain please
Shkiper50 [21]

Answer:

0.200M H₃PO₄

0.600N H₃PO₄

pH = 1.46

Explanation:

The acid-base reaction of phosphoric acid (H₃PO₄) with LiOH is:

3 LiOH + H₃PO₄ → Li₃PO₄ + 3H₂O

<em>Where 3 moles of LiOH reacts per mole of H₃PO₄</em>

<em />

Moles of LiOH are:

0.030L× (0.5mol / L) = 0.0150 moles of LiOH

Moles of acid neutralized are:

0.0150 moles of LiOH × (1 mole H₃PO₄ / 3 moles LiOH) = 0.005 moles H₃PO₄

As volume of acid was 25mL, molarity is:

0.005mol H₃PO₄ / 0.025L =<em> 0.200M H₃PO₄</em>

Normality is:

0.200M × (3N H⁺ / 1M H₃PO₄) = <em>0.600N H₃PO₄</em>

H₃PO₄ dissolves in water thus:

H₃PO₄ ⇄ H₂PO₄⁻ + H⁺

Ka = 7.1x10⁻³ = [H₂PO₄⁻] [H⁺] / [H₃PO₄]

Where molar concentrations in equilibrium will be:

[H₂PO₄⁻] = X

[H⁺] = X

[H₃PO₄] = 0.200M - X

Replacing in Ka formula:

7.1x10⁻³ = [X] [X] / [0.200 - X]

1.42x10⁻³ - 7.1x10⁻³X = X²

0 = X² + 7.1x10⁻³X - 1.42x10⁻³

Solving for X:

X = -0.04M →False answer, there is no negative concentrations.

X = 0.0343M

As, [H⁺] = 0.0343M

pH = - log [H⁺],

<em>pH = 1.46</em>

6 0
3 years ago
At standard pressure, which element has a freezing point below standard temperature?
borishaifa [10]
⛄ (4)HG
-This is because it has a freezing point below standard temperature. 

5 0
4 years ago
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