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sashaice [31]
3 years ago
13

Microorganisms have a major role in maintaining soil biodiversity. They recycle nutrients in ecosystems and decompose organic ma

tter in soil. Organic matter contains dead and living plant and animal materials. Microorganisms convert these materials into simpler compounds that maintain soil quality and help with plant growth.
Which solution could best help to restore or increase microorganisms and soil biodiversity?
A.
adding manure or compost to the soil
B.
spraying chemical weed-killers and fertilizers on the soil
C.
removing all ground-covering plants from the soil
D.
adding sewage containing synthetic materials to the soil
Chemistry
1 answer:
Paha777 [63]3 years ago
3 0

Answer:

A i think

Explanation:

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What is the kb of the base po−34 given that a 0. 48m solution of the base has a ph of 12. 70? the equation described by the kb v
podryga [215]

The equation described by the kb value is 5.21 x 10^-^3.

The potential of Hydrogen is what pH is formally known as. The negative logarithm of the concentration of H+ ions is known as pH. Thus, the definition of pH as the amount of hydrogen is provided. The hydrogen ion concentration in a solution is described by the pH scale, which also serves as a gauge for the solution's acidity or basicity.

Assuming  PO₄³⁻ (the phosphate anion).

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Kb = [HPO₄²⁻][OH⁻] / [PO₄³⁻]

We can find the [OH⁻] from the pH of 12.70.

pH + pOH = 14

14.0 - 12.7 = 1.3 = pOH

[OH] = 1x10^-^1^.^3

[OH-] = 5.0x10^-^2 M

[HPO₄²⁻] = 5.0x10^-^2 M

Kb = (5.0x10^-^2)2 / 0.48

     = 2.5x10^-^3 / 0.48

Kb = 5.21 x 10^-^3

Learn more about pH here:

brainly.com/question/8758541

#SPJ4

3 0
1 year ago
Reaction rate describes the blank <br> of a chemical reaction
butalik [34]

Answer:

Explanation:

Likewise, the rate of a chemical reaction is a measure of how much reactant is consumed, or how much product is produced, by the reaction in a given amount of time. The rate of reaction is the change in the amount of a reactant or product per unit time.

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