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3 years ago

Which layer of the earth contains humus?

Chemistry

2 answers:

Tcecarenko [31]3 years ago

5 0

The top layer cause when leaves and branches drop they pile up

gavmur [86]3 years ago

5 0

Greetings!

Most of the Humus found in soil is in the Top Layer of the soil or Topsoil.

Here is the Formation of Soil for Reference:
From the Top Layer to Bottom.

1) Topsoil

2) Subsoil

3) Parent Material

4) Bedrock

Hope this helps.
-Benjamin

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A chemist combines iodoethane (ch3ch2i with sodium hydroxide (naoh in an aqueous solution at 100°c. which change to the reaction

antoniya [11.8K]

The replacing of sodium hydroxide with potassium hydroxide (KOH) to the reaction will least affect the organic product that forms.

Potassium hydroxide is an inorganic compound with the formula KOH, and is commonly called caustic potash. Along with sodium hydroxide, this colorless solid is a prototypical strong base.

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4 years ago

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Summarize how chemical energy is formed from light energy

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I believe that the answer to the question provided above is light energy is trapped, and by certain enzymes then transformed to chemical energy.
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.

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3 years ago

An aqueous solution of calcium hydroxide is standardized by titration with a 0.183 M solution of hydrochloric acid. If 16.6 mL o

monitta

Answer:

0.142 M

Explanation:

Let's consider the neutralization reaction between calcium hydroxide and hydrochloric acid.

Ca(OH)₂ + 2 HCl → CaCl₂ + 2 H₂O

25.8 mL of 0.183 M HCl are used. The reacting moles are:

0.0258 L × 0.183 mol/L = 4.72 × 10⁻³ mol

The molar ratio of Ca(OH)₂ to HCl is 1:2. The reacting moles of Ca(OH)₂ are 1/2 × 4.72 × 10⁻³ mol = 2.36 × 10⁻³ mol

2.36 × 10⁻³ moles of Ca(OH)₂ are contained in 16.6 mL. The molarity of Ca(OH)₂ is:

M = 2.36 × 10⁻³ mol/0.0166 L = 0.142 M

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3 years ago

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Which of the following equilibrium expressions corresponds to a heterogeneous equilibrium?(a) Kc =[NH4+][OH−][NH3](b) Kc =[H+][C

Alex777 [14]

Answer:

c. $Kc = \frac{[Ag(NH_{3})_2^{+}][Cl^-]}{[NH_3]^2}}$

d. $Kc = [Ba^{2+}][F^{-}]^2$

Explanation:

An heterogeneous equilibrium is defined as a system whose reactants, products, or both are in more than one phase.

Also, you must know in an equilibrium constant you don't take solids or pure liquids. Thus:

a. $Kc = \frac{[NH_{4}^+][OH^-]}{[NH_3]}}$

The reaction must be: NH₃(aq) + H₂O(l) ⇆ NH₄⁺(aq) + OH⁻(aq) All reactants are in the same phase.

b. $Kc = \frac{[H^+][C_2H_3O_{2}^-]}{[HC_2H_3O_2]}}$

The reaction must be: HC₂H₃O₂(aq) ⇄ H⁺(aq) + C₂H₃O₂⁻(aq) All reactants are in the same phase.

c. $Kc = \frac{[Ag(NH_{3})_2^{+}][Cl^-]}{[NH_3]^2}}$

The reaction must be: 2NH₃(aq) + AgCl(s) ⇄ Ag(NH₃)₂⁺(aq) + Cl⁻(aq)

Reactants aren´t in the same phase. Heterogeneous equilibrium

d. $Kc = [Ba^{2+}][F^{-}]^2$

The reaction must be: BaF₂(s) ⇆ Ba²⁺(aq) + 2F⁻(aq)

Reactants aren´t in the same phase. Heterogeneous equilibrium

I hope it helps!

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3 years ago

4. What is a scientific law, and how does it differ from a theory?

GalinKa [24]

Scientific law = Describe what phenomena happen , Theory = Explains why phenomena occur

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3 years ago